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Indiana Administrative Code (Last Updated: December 20, 2016) |
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Title 327. WATER POLLUTION CONTROL DIVISION |
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Article 327IAC2. WATER QUALITY STANDARDS |
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Rule 327IAC2-1. Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System |
Section 327IAC2-1-6. Minimum surface water quality standards
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(a) The following are minimum surface water quality conditions:
(1) All surface waters at all times and at all places, including waters within the mixing zone, shall meet the minimum conditions of being free from substances, materials, floating debris, oil, or scum attributable to municipal, industrial, agricultural, and other land use practices, or other discharges that do any of the following:
(A) Will settle to form putrescent or otherwise objectionable deposits.
(B) Are in amounts sufficient to be unsightly or deleterious.
(C) Produce:
(i) color;
(ii) visible oil sheen;
(iii) odor; or
(iv) other conditions;
in such degree as to create a nuisance.
(D) Are in concentrations or combinations that will cause or contribute to the growth of aquatic plants or algae to such degree as to:
(i) create a nuisance;
(ii) be unsightly; or
(iii) otherwise impair the designated uses.
(E) Are in amounts sufficient to be acutely toxic to, or to otherwise severely injure or kill, aquatic life, other animals, plants, or humans. To assure protection of aquatic life, concentrations of toxic substances shall not exceed the final acute value (FAV = 2 (AAC)) in the undiluted discharge or the acute aquatic criterion (AAC) outside the zone of initial dilution or, if applicable, the zone of discharge-induced mixing:
(i) for certain substances, an AAC is established and set forth in subdivision (3), Table 6-1, subdivision (3), Table 6-2 (which table incorporates subdivision (4), Table 6-3), and subdivision (5);
(ii) for substances for which an AAC is not specified in subdivision (3), Table 6-1, subdivision (3), Table 6-2, or subdivision (5), an AAC can be calculated by the commissioner using the procedures in section 8.2 of this rule; and
(iii) the AAC determined under item (i) or (ii) may be modified on a site-specific basis to reflect local conditions in accordance with section 8.9 of this rule.
This clause shall not apply to the chemical control of plants and animals when that control is performed in compliance with approval conditions specified by the Indiana department of natural resources as provided by IC 14-22-9.
(2) At all times, all surface waters outside of mixing zones shall be free of substances in concentrations that on the basis of available scientific data are believed to be sufficient to injure, be chronically toxic to, or be carcinogenic, mutagenic, or teratogenic to humans, animals, aquatic life, or plants. To assure protection against the adverse effects identified in this subdivision, the following requirements are established:
(A) A toxic substance or pollutant shall not be present in such waters in concentrations that exceed the most stringent of the following continuous criterion concentrations (CCCs):
(i) A chronic aquatic criterion (CAC) to protect aquatic life from chronic toxic effects.
(ii) A terrestrial life cycle safe concentration (TLSC) to protect terrestrial organisms from toxic effects that may result from the consumption of aquatic organisms or water from the waterbody.
(iii) A human life cycle safe concentration (HLSC) to protect human health from toxic effects that may result from the consumption of aquatic organisms or drinking water from the waterbody.
(iv) For carcinogenic substances, a criterion to protect human health from unacceptable cancer risk of greater than one (1) additional occurrence of cancer per one hundred thousand (100,000) population.
(B) For certain substances, one (1) or more of the CCCs identified in clause (A) are established and set forth in subdivision (3), Table 6-1, subdivision (3), Table 6-2 (which table incorporates subdivision (4), Table 6-3), and subdivision (5).
(C) For substances for which one (1) or more of the CCCs identified in clause (A) are not specified in subdivision (3), Table 6-1, subdivision (3), Table 6-2, or subdivision (5), such criterion or criteria may be calculated by the commissioner using the corresponding procedures prescribed by sections 8.3 through 8.6 of this rule.
(D) A CCC determined under clause (B) or (C) may be modified on a site-specific basis to reflect local conditions in accordance with section 8.9 of this rule.
(E) The CAC and TLSC for a substance apply in all surface waters outside a mixing zone for a discharge of that substance. Similarly, in waters where a public water system intake is not present or is unaffected by the discharge of a substance, the HLSC and the carcinogenic criterion for that substance based on consumption of organisms from the waterbody and only incidental ingestion of water shall apply to all surface waters outside the mixing zone for a discharge of that substance. In surface waters where a public water system intake is present, the HLSC and the carcinogenic criterion for a substance based on consumption of organisms and potable water from the waterbody shall apply at the point of the public water system intake.
(3) The following establishes surface water quality criteria for specific substances:
Table 6-1
Surface Water Quality Criteria for Specific Substances
AAC (Maximum)
CCC
Substances
Outside of Mixing Zone
Point of Water Intake
Aquatic Life (CAC) (4-Day Average)
Human Health (30-Day Average)
Human Health (30-Day Average)
Metals (μg/l)
(Total recoverable)
Antimony
45,000 (T)
146 (T)
Arsenic (III)
#
#
0.175 (C)
0.022 (C)
Barium
1,000 (D)
Beryllium
1.17 (C)
0.068 (C)
Cadmium
#
#
10 (D)
Chromium (III)
#
#
3,433,000 (T)
170,000 (T)
Chromium (VI)
#
#
50 (D)
Copper
#
#
Lead
#
#
50 (D)
Mercury$
2.4
0.012
0.15 (T)
0.14 (T)
Nickel
#
#
100 (T)
13.4 (T)
Selenium
130*
35
10 (D)
Silver
#
50 (D)
Thallium
48 (T)
13 (T)
Zinc
#
#
Organics (μg/l)
Acrolein
780 (T)
320 (T)
Acrylonitrile
6.5 (C)
0.58 (C)
Aldrin$
1.5*
0.00079 (C)
0.00074 (C)
Benzene
400 (C)
6.6 (C)
Benzidine
0.0053 (C)
0.0012 (C)
Carbon Tetrachloride
69.4 (C)
4.0 (C)
Chlordane$
1.2*
0.0043
0.0048 (C)
0.0046 (C)
Chlorinated Benzenes
Monochlorobenzene
488 (T)
1,2,4,5-Tetrachlorobenzene $
48 (T)
38 (T)
Pentachlorobenzene $
85 (T)
74 (T)
Hexachlorbenzene$
0.0074 (C)
0.0072 (C)
Chlorinated Ethanes
1,2-dichloroethane
2,430 (C)
9.4 (C)
1,1,1-trichloroethane
1,030,000 (T)
18,400 (T)
1,1,2-trichloroethane
418 (C)
6.0 (C)
1,1,2,2-tetrachloroethane
107 (C)
1.7 (C)
Hexachloroethane
87.4 (C)
19 (C)
Chlorinated Phenols
2,4,5-trichlorophenol
2,600 (T)
2,4,6-trichlorophenol
36 (C)
12 (C)
Chloroalkyl Ethers
bis(2-chloroisopropyl) ether
4,360 (T)
34.7 (T)
bis(chloromethyl) ether
0.018 (C)
0.000038 (C)
bis(2-chloroethyl) ether
13.6 (C)
0.3 (C)
Chloroform
157 (C)
1.9 (C)
Chlorpyrifos
0.083
0.041
DDT$
0.55*
0.0010
0.00024 (C)
0.00024 (C)
Dichlorobenzenes
2,600 (T)
400 (T)
Dichlorobenzidine
0.2 (C)
0.1 (C)
1,1-dichloroethylene
18.5 (C)
0.33 (C)
2,4-dichlorophenol
3,090 (T)
Dichloropropenes
14,100 (T)
87 (T)
Dieldrin$
1.3*
0.0019
0.00076 (C)
0.00071 (C)
2,4-dinitrotoluene
91 (C)
1.1 (C)
Dioxin (2,3,7,8-TCDD)$
0.0000001 (C)
0.0000001 (C)
1,2-diphenylhydrazine
5.6 (C)
0.422 (C)
Endosulfan
0.11*
0.056
159 (T)
74 (T)
Endrin$
0.09*
0.0023
1.0 (D)
Ethylbenzene
3,280 (T)
1,400 (T)
Fluoranthene
54 (T)
42 (T)
Halomethanes
157 (C)
1.9 (C)
Heptachlor$
0.26*
0.0038
0.0028 (C)
0.0028 (C)
Hexachlorobutadiene$
500 (C)
4.47 (C)
Hexachlorocyclohexane (HCH)
alpha HCH$
0.31 (C)
0.09 (C)
beta HCH$
0.55 (C)
0.16 (C)
gamma HCH (Lindane)$
1.0*
0.080
0.63 (C)
0.19 (C)
Technical HCH$
0.41 (C)
0.12 (C)
Hexachlorocyclopentadiene
206 (T)
Isophorone
520,000 (T)
5,200 (T)
Nitrobenzene
19,800 (T)
Nitrophenols
4,6-dinitro-o-cresol
765 (T)
13.4 (T)
Dinitrophenol
14,300 (T)
70 (T)
Nitrosamines
N-nitrosodiethylamine
12.4 (C)
0.008 (C)
N-nitrosodimethylamine
160 (C)
0.014 (C)
N-nitrosodibutylamine
5.9 (C)
0.064 (C)
N-nitrosodiphenylamine
161 (C)
49 (C)
N-nitrosopyrrolidine
919 (C)
0.16 (C)
Parathion
0.065
0.013
Pentachlorophenol
e(1.005 [pH]-4.830)
e(1.005 [pH]-5.290)
1,000 (T)
Phenol
3,500 (T)
Phthalate Esters
Dimethyl phthalate
2,900,000 (T)
313,000 (T)
Diethyl phthalate
1,800,000 (T)
350,000 (T)
Dibutyl phthalate
154,000 (T)
34,000 (T)
Di-2-ethylhexyl phthalate
50,000 (T)
15,000 (T)
Polychlorinated Biphenyls (PCBs)$
0.014
0.00079 (C)
0.00079 (C)
Carcinogenic Polynuclear Aromatic Hydrocarbons (PAHs)
0.31 (C)
0.028 (C)
Tetrachloroethylene
88.5 (C)
8 (C)
Toluene
424,000 (T)
14,300 (T)
Toxaphene$
0.73
0.0002
0.0073 (C)
0.0071 (C)
Trichloroethylene
807 (C)
27 (C)
Vinyl Chloride
5,246 (C)
20 (C)
Other Substances
Asbestos (fibers/liter)
300,000 (C)
Chloride (mg/l)
**
**
Chlorine
(Total Residual) (μg/l)
19
11
Chlorinea (mg/l)
(intermittent, total residual)
0.2
Cyanide (Free) (μg/l)
22
5.2
Cyanide (Total) (μg/l)
200 (D)
Nitrate-N + Nitrite-N (mg/l)
10 (D)
Nitrite-N (mg/l)
1.0 (D)
Fluoride shall not exceed two (2.0) mg/l in all surface waters outside of the mixing zone except the Ohio River and Interstate Wabash River where it shall not exceed one (1.0) mg/l outside of the mixing zone.
Sulfate shall not exceed the criteria established in subdivision (6) in all surface waters outside of the mixing zone.
#The AAC and CAC for this substance are established in Table 6-2.
*One-half (1/2) of the final acute value (FAV) as calculated by procedures developed by U.S. EPA in 1980. This value would correspond to acute aquatic values calculated using IDEM procedures or U.S. EPA procedures developed in 1985 in which the calculated FAV is divided by two (2) to reduce acute toxicity.
**The AAC and CAC for this substance are established in subdivision (5).
T derived from threshold toxicity.
C derived from nonthreshold cancer risk.
D derived from drinking water standards, equal to or less than threshold toxicity.
$This substance is a bioaccumulative chemical of concern.
aTo be considered an intermittent discharge, total residual chlorine shall not be detected in the discharge for a period of more than forty (40) minutes in duration, and such periods shall be separated by at least five (5) hours.
Table 6-2
Surface Water Quality Criteria for Specific Substances
Substances
AAC (Maximum) (µg/l)
AAC Conversion Factors
CAC (4-Day Average) (µg/l)
CAC Conversion Factors
Metals (dissolved)[1]
Arsenic (III)
WER[2](360)
1.000
WER[2](190)
1.000
Cadmium
WER[2](e(1.128 [ln(hardness)]-3.828))
1.136672-[(ln hardness) (0.041838)]
WER[2](e(0.7852 [ln(hardness)]-3.490))
1.101672-[(ln hardness) (0.041838)]
Chromium (III)
WER[2](e(0.819 [ln(hardness)]+3.688))
0.316
WER[2](e(0.8190 [ln(hardness)]+1.561))
0.860
Chromium (VI)
WER[2](16)
0.982
WER[2](11)
0.962
Copper
WER[2](e(0.9422 [ln(hardness)]-1.464))
0.960
WER[2](e(0.8545 [ln(hardness)]-1.465))
0.960
Lead
WER[2](e(1.273 [ln(hardness)]-1.460))
1.46203-[(ln hardness) (0.145712)]
WER[2](e(1.273 [ln(hardness)]-4.705))
1.46203-[(ln hardness) (0.145712)]
Nickel
WER[2](e(0.8460 [ln(hardness)]+3.3612))
0.998
WER[2](e(0.8460 [ln(hardness)]+1.1645))
0.997
Silver
WER[2](e(1.72 [ln(hardness)]-6.52)/2[3])
0.85
Zinc
WER[2](e(0.8473 [ln(hardness)]+0.8604))
0.978
WER[2](e(0.8473 [ln(hardness)]+0.7614))
0.986
[1] The AAC and CAC columns of this table contain total recoverable metals criteria (numeric and hardness-based). The criterion for the dissolved metal is calculated by multiplying the appropriate conversion factor by the AAC or CAC. This dissolved AAC or CAC shall be rounded to two (2) significant digits, except when the criteria are used as intermediate values in a calculation, such as in the calculation of water quality-based effluent limitations (WQBELs).
[2] A value of one (1) shall be used for the water-effect ratio (WER) unless an alternate value is established under section 8.9 of this rule.
[3] One-half (1/2) of the FAV as calculated by procedures developed by U.S. EPA in 1980. This value would correspond to acute aquatic values calculated using IDEM procedures or U.S. EPA procedures developed in 1985 in which the calculated FAV is divided by two (2) to reduce acute toxicity.
(4) The following establishes dissolved AAC and CAC for certain metals at selected hardness values calculated from the equations and conversion factors in subdivision (3), Table 6-2 and using a value of one (1) for the WER:
Table 6-3
Metals Concentrations in Micrograms Per Liter; Hardness in Milligrams Per Liter CaCO31
Arsenic (III)
Cadmium
Chromium (III)
Chromium (VI)
Copper
Lead
Nickel
Silver
Zinc
Hardness
AAC
CAC
AAC
CAC
AAC
CAC
AAC
CAC
AAC
CAC
AAC
CAC
AAC
CAC
AAC
CAC
AAC
CAC
50
360
190
1.7
0.62
310
100
16
11
8.9
6.3
30
1.2
790
87
0.52
─
64
58
100
360
190
3.7
1.0
550
180
16
11
17
11
65
2.5
1400
160
1.7
─
110
100
150
360
190
5.7
1.4
760
250
16
11
25
16
100
3.9
2000
220
3.5
─
160
150
200
360
190
7.8
1.7
970
310
16
11
33
21
140
5.3
2500
280
5.7
─
210
190
250
360
190
10
2.0
1200
380
16
11
40
25
170
6.7
3100
340
8.3
─
250
230
300
360
190
12
2.3
1300
440
16
11
48
29
210
8.1
3600
400
11
─
290
270
350
360
190
14
2.6
1500
500
16
11
55
33
240
9.5
4100
450
15
─
330
300
400
360
190
17
2.9
1700
550
16
11
63
37
280
11
4600
510
19
─
370
340
450
360
190
19
3.1
1900
610
16
11
70
41
320
12
5100
560
23
─
410
370
500
360
190
21
3.4
2100
670
16
11
78
45
350
14
5500
610
27
─
450
410
[1] The dissolved metals criteria in this table have been rounded to two (2) significant digits in accordance with subdivision (3), Table 6-2. The equations and conversion factors in subdivision (3), Table 6-2 shall be used instead of the criteria in this table when dissolved metals criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs.
(5) The following establishes surface water quality criteria for chloride for protection of aquatic life:
(A) The following provides the AAC for chloride as a function of hardness (in mg/l as CaCO3) and sulfate (in mg/l) in surface waters:
C = 287.8 (hardness)0.205797 (sulfate)-0.07452
Where: C = chloride AAC (maximum) in mg/l.
(B) The following provides the CAC for chloride as a function of hardness (in mg/l as CaCO3) and sulfate (in mg/l) in surface waters:
C = 177.87 (hardness)0.205797 (sulfate)-0.07452
Where: C = chloride CAC (4-day average) in mg/l.
(C) The following applies to the AAC and CAC for chloride provided in this subdivision:
(i) Chloride criteria may only be established based on a sulfate concentration greater than the water quality criterion for sulfate, as established under subdivision (6), where the water quality criterion for sulfate has been modified on a site-specific basis in accordance with either the variance provisions under section 8.8 of this rule or the site-specific criteria provisions under section 8.9 of this rule.
(ii) The AAC and CAC for chloride calculated from the equations in this subdivision shall be rounded to the nearest whole numbers, except when the criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs.
(D) The following establishes the AAC for chloride in mg/l at selected concentrations of hardness and sulfate, with the understanding that the equation in clause (A) shall be used instead of the criteria in this clause when chloride criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs:
Hardness (mg/l)
Sulfate (mg/l)
50
100
150
200
250
300
350
400
450
500
15
526
607
660
700
733
761
785
807
827
845
20
515
594
646
685
717
745
769
790
809
827
25
506
584
635
674
705
732
756
777
796
813
50
481
555
603
640
670
695
718
738
756
773
100
457
527
573
608
636
660
682
701
718
734
150
443
511
556
589
617
641
661
680
697
712
200
434
500
544
577
604
627
647
665
682
697
250
427
492
535
567
594
617
637
654
671
685
300
421
485
528
560
586
609
628
646
661
676
350
416
480
522
553
579
602
621
638
654
668
400
412
475
516
548
574
596
615
632
647
662
450
408
471
512
543
569
590
609
626
642
656
500
405
467
508
539
564
586
605
622
637
651
(E) The following establishes the CAC for chloride in mg/l at selected concentrations of hardness and sulfate, with the understanding that the equation in clause (B) shall be used instead of the criteria in this clause when chloride criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs:
Hardness (mg/l)
Sulfate (mg/l)
50
100
150
200
250
300
350
400
450
500
15
325
375
408
433
453
470
485
499
511
522
20
318
367
399
423
443
460
475
488
500
511
25
313
361
392
416
436
453
467
480
492
503
50
297
343
373
395
414
430
444
456
467
477
100
282
326
354
375
393
408
421
433
444
453
150
274
316
343
364
381
396
409
420
430
440
200
268
309
336
357
373
388
400
411
421
431
250
264
304
331
351
367
381
394
404
414
423
300
260
300
326
346
362
376
388
399
409
418
350
257
297
322
342
358
372
384
394
404
413
400
255
294
319
339
355
368
380
391
400
409
450
252
291
316
336
351
365
377
387
397
405
500
250
289
314
333
349
362
374
384
394
402
(6) The following establishes surface water quality criteria for sulfate that shall not be exceeded in all surface waters outside of the mixing zone:
(A) The following provides surface water quality criteria for sulfate in mg/l for the specified ranges of hardness (in mg/l as CaCO3) or chloride (in mg/l), or both:
(i) If the hardness concentration of surface waters is greater than or equal to one hundred (100) mg/l but less than or equal to five hundred (500) mg/l, and if the chloride concentration of surface waters is greater than or equal to five (5) mg/l but less than twenty-five (25) mg/l, then:
C = [-57.478 + 5.79 (hardness) + 54.163 (chloride)] × 0.65
Where: C = sulfate criterion in mg/l.
(ii) If the hardness concentration of surface waters is greater than or equal to one hundred (100) mg/l but less than or equal to five hundred (500) mg/l, and if the chloride concentration of surface waters is greater than or equal to twenty-five (25) mg/l but less than or equal to five hundred (500) mg/l, then:
C = [1276.7 + 5.508 (hardness) - 1.457 (chloride)] × 0.65
Where: C = sulfate criterion in mg/l.
(iii) If the hardness concentration of surface waters is less than one hundred (100) mg/l and the chloride concentration of surface waters is less than or equal to five hundred (500) mg/l, the sulfate criterion is five hundred (500) mg/l.
(iv) If the hardness concentration of surface waters is greater than five hundred (500) mg/l and the chloride concentration of surface waters is greater than or equal to five (5) mg/l, but less than or equal to five hundred (500) mg/l, the sulfate criterion shall be calculated using a hardness concentration of five hundred (500) mg/l and the equation in item (i) or (ii) that applies to the chloride concentration.
(v) If the chloride concentration of surface waters is less than five (5) mg/l, the sulfate criterion is five hundred (500) mg/l.
(B) The following applies to the surface water quality criteria for sulfate provided in clause (A):
(i) Sulfate criteria may only be established based on a chloride concentration greater than the CAC for chloride established under subdivision (5) where the CAC for chloride has been modified on a site-specific basis in accordance with either the variance provisions under section 8.8 of this rule or the site-specific criteria provisions under section 8.9 of this rule.
(ii) The surface water quality criteria for sulfate calculated from equations in clause (A) shall be rounded to the nearest whole numbers, except when the criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs.
(C) The following establishes surface water quality criteria for sulfate in mg/l at selected concentrations of hardness and chloride, with the understanding that the equations in clause (A) shall be used instead of the criteria in this clause when sulfate criteria are used as intermediate values in a calculation, such as in the calculation of WQBELs:
Hardness (mg/l)
Chloride (mg/l)
<100
100
150
200
250
300
350
400
450
500
>500
<5
500
500
500
500
500
500
500
500
500
500
500
5
500
515
703
891
1,080
1,268
1,456
1,644
1,832
2,020
2,020
10
500
691
879
1,067
1,256
1,444
1,632
1,820
2,008
2,196
2,196
15
500
867
1,055
1,243
1,432
1,620
1,808
1,996
2,184
2,372
2,372
20
500
1,043
1,231
1,419
1,608
1,796
1,984
2,172
2,360
2,549
2,549
25
500
1,164
1,343
1,522
1,701
1,880
2,059
2,238
2,417
2,596
2,596
50
500
1,141
1,320
1,499
1,678
1,857
2,036
2,215
2,394
2,573
2,573
100
500
1,093
1,272
1,451
1,630
1,809
1,988
2,167
2,346
2,525
2,525
150
500
1,046
1,225
1,404
1,583
1,762
1,941
2,120
2,299
2,478
2,478
200
500
998
1,177
1,356
1,535
1,715
1,894
2,073
2,252
2,431
2,431
250
500
951
1,130
1,309
1,488
1,667
1,846
2,025
2,204
2,383
2,383
(b) This subsection establishes minimum surface water quality for aquatic life. In addition to subsection (a), subdivisions (1) through (5) are established to ensure conditions necessary for the maintenance of a well-balanced aquatic community. The following are applicable at any point in the waters outside of the mixing zone:
(1) There shall be no substances that:
(A) impart unpalatable flavor to food fish; or
(B) result in offensive odors in the vicinity of the water.
(2) No pH values below six (6.0) or above nine (9.0), except daily fluctuations that:
(A) exceed pH nine (9.0); and
(B) are correlated with photosynthetic activity;
shall be permitted.
(3) Concentrations of dissolved oxygen shall:
(A) average at least five (5.0) milligrams per liter per calendar day; and
(B) not be less than four (4.0) milligrams per liter at any time.
(4) The following are conditions for temperature:
(A) There shall be no abnormal temperature changes that may adversely affect aquatic life unless caused by natural conditions.
(B) The normal daily and seasonal temperature fluctuations that existed before the addition of heat due to other than natural causes shall be maintained.
(C) The maximum temperature rise at any time or place above natural temperatures shall not exceed:
(i) five (5) degrees Fahrenheit (two and eight-tenths (2.8) degrees Celsius) in streams; and
(ii) three (3) degrees Fahrenheit (one and seven-tenths (1.7) degrees Celsius) in lakes and reservoirs.
(D) Water temperatures shall not exceed the maximum limits in the following table during more than one percent (1%) of the hours in the twelve (12) month period ending with any month. At no time shall the water temperature at such locations exceed the maximum limits in the following table by more than three (3) degrees Fahrenheit (one and seven-tenths (1.7) degrees Celsius):
Table 6-4
Ohio River Main Stem °F(°C)
Other Indiana Streams °F(°C)
January
50 (10.0)
50 (10.0)
February
50 (10.0)
50 (10.0)
March
60 (15.6)
60 (15.6)
April
70 (21.1)
70 (21.1)
May
80 (26.7)
80 (26.7)
June
87 (30.6)
90 (32.2)
July
89 (31.7)
90 (32.2)
August
89 (31.7)
90 (32.2)
September
87 (30.7)
90 (32.2)
October
78 (25.6)
78 (25.5)
November
70 (21.1)
70 (21.1)
December
57 (14.0)
57 (14.0)
(5) The following criteria will be used to regulate ammonia:
(A) Except for waters covered in clause (B), at all times, all surface waters outside of mixing zones shall be free of substances in concentrations that, on the basis of available scientific data, are believed to be sufficient to:
(i) injure;
(ii) be chronically toxic to; or
(iii) be carcinogenic, mutagenic, or teratogenic to;
humans, animals, aquatic life, or plants.
(B) For those waters listed in subsection (c), the following ammonia criteria will apply outside the mixing zone:
Maximum Ammonia Concentrations
(Unionized Ammonia as N)***
(mg/l)
Temperature (°C)
pH
0
5
10
15
20
25
30
6.5
0.0075
0.0106
0.0150
0.0211
0.0299
0.0299
0.0299
6.6
0.0092
0.0130
0.0183
0.0259
0.0365
0.0365
0.0365
6.7
0.0112
0.0158
0.0223
0.0315
0.0444
0.0444
0.0444
6.8
0.0135
0.0190
0.0269
0.0380
0.0536
0.0536
0.0536
6.9
0.0161
0.0228
0.0322
0.0454
0.0642
0.0642
0.0642
7.0
0.0191
0.0270
0.0381
0.0539
0.0761
0.0761
0.0761
7.1
0.0244
0.0316
0.0447
0.0631
0.0892
0.0892
0.0892
7.2
0.0260
0.0367
0.0518
0.0732
0.1034
0.1034
0.1034
7.3
0.0297
0.0420
0.0593
0.0837
0.1183
0.1183
0.1183
7.4
0.0336
0.0474
0.0669
0.0946
0.1336
0.1336
0.1336
7.5
0.0374
0.0528
0.0746
0.1054
0.1489
0.1489
0.1489
7.6
0.0411
0.0581
0.0821
0.1160
0.1638
0.1638
0.1638
7.7
0.0447
0.0631
0.0892
0.1260
0.1780
0.1780
0.1780
7.8
0.0480
0.0678
0.0958
0.1353
0.1911
0.1911
0.1911
7.9
0.0510
0.0720
0.1017
0.1437
0.2030
0.2030
0.2030
8.0
0.0536
0.0758
0.1070
0.1512
0.2135
0.2135
0.2135
8.1
0.0537
0.0758
0.1071
0.1513
0.2137
0.2137
0.2137
8.2
0.0537
0.0758
0.1071
0.1513
0.2137
0.2137
0.2137
8.3
0.0537
0.0758
0.1071
0.1513
0.2137
0.2137
0.2137
8.4
0.0537
0.0758
0.1071
0.1513
0.2137
0.2137
0.2137
8.5
0.0537
0.0758
0.1071
0.1513
0.2137
0.2137
0.2137
8.6
0.0537
0.0758
0.1071
0.1513
0.2137
0.2137
0.2137
8.7
0.0537
0.0758
0.1071
0.1513
0.2137
0.2137
0.2137
8.8
0.0537
0.0758
0.1071
0.1513
0.2137
0.2137
0.2137
8.9
0.0537
0.0758
0.1071
0.1513
0.2137
0.2137
0.2137
9.0
0.0537
0.0758
0.1071
0.1513
0.2137
0.2137
0.2137
***To calculate total ammonia, divide the number in the table by the value determined by: 1/(10pK a -pH + 1).
Where:
pKa
=
0.09018 + (2729.92/(T + 273.2))
pH
=
pH of water
T
=
°C
24-Hour Average Ammonia Concentrations
(Unionized Ammonia as N)***
(mg/l)
Temperature (°C)
pH
0
5
10
15
20
25
30
6.5
0.0005
0.0008
0.0011
0.0015
0.0015
0.0015
0.0015
6.6
0.0007
0.0010
0.0014
0.0019
0.0019
0.0019
0.0019
6.7
0.0009
0.0012
0.0017
0.0024
0.0024
0.0024
0.0024
6.8
0.0011
0.0015
0.0022
0.0031
0.0031
0.0031
0.0031
6.9
0.0014
0.0019
0.0027
0.0038
0.0038
0.0038
0.0038
7.0
0.0017
0.0024
0.0034
0.0048
0.0048
0.0048
0.0048
7.1
0.0022
0.0031
0.0043
0.0061
0.0061
0.0061
0.0061
7.2
0.0027
0.0038
0.0054
0.0077
0.0077
0.0077
0.0077
7.3
0.0034
0.0048
0.0068
0.0097
0.0097
0.0097
0.0097
7.4
0.0043
0.0061
0.0086
0.0122
0.0122
0.0122
0.0122
7.5
0.0054
0.0077
0.0108
0.0153
0.0153
0.0153
0.0153
7.6
0.0068
0.0097
0.0136
0.0193
0.0193
0.0193
0.0193
7.7
0.0086
0.0122
0.0172
0.0242
0.0242
0.0242
0.0242
7.8
0.0092
0.0130
0.0184
0.0260
0.0260
0.0260
0.0260
7.9
0.0098
0.0138
0.0196
0.0276
0.0276
0.0276
0.0276
8.0
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
8.1
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
8.2
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
8.3
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
8.4
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
8.5
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
8.6
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
8.7
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
8.8
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
8.9
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
9.0
0.0103
0.0146
0.0206
0.0294
0.0294
0.0294
0.0294
***To calculate total ammonia, divide the number in the table by the value determined by: 1/(10pK a -pH + 1).
Where:
pKa
=
0.09018 + (2729.92/(T + 273.2))
pH
=
pH of water
T
=
°C
(c) This subsection establishes surface water quality for cold-water fish. In addition to subsections (a) and (b), the following criteria are established to ensure conditions necessary for the maintenance of a well-balanced, cold-water fish community and are applicable at any point in the waters outside of the mixing zone:
(1) Waters:
(A) designated as salmonid waters; and
(B) that shall be protected for cold-water fish;
are those waters designated by the Indiana department of natural resources for put-and-take trout fishing.
(2) In the waters listed in subdivision (1), dissolved oxygen concentrations shall not be less than:
(A) six (6.0) milligrams per liter at any time; and
(B) seven (7.0) milligrams per liter in areas where spawning occurs during the spawning season and in areas used for imprinting during the time salmonids are being imprinted.
(3) In those waters listed in subdivision (1), the maximum temperature rise above natural shall not exceed two (2) degrees Fahrenheit (one and one-tenth (1.1) degrees Celsius) at any time or place and, unless due to natural causes, the temperature shall not exceed the following:
(A) Seventy (70) degrees Fahrenheit (twenty-one and one-tenth (21.1) degrees Celsius) at any time.
(B) Sixty-five (65) degrees Fahrenheit (eighteen and three-tenths (18.3) degrees Celsius) during spawning and imprinting periods.
(d) This subsection establishes bacteriological quality for recreational uses during the recreational season as follows:
(1) The recreational season is defined as the months of April through October, inclusive.
(2) In addition to subsection (a), the criteria in this subsection are to be used to do the following:
(A) Evaluate waters for full body contact recreational uses.
(B) Establish wastewater treatment requirements.
(C) Establish effluent limits during the recreational season.
(3) For full body contact recreational uses, E. coli bacteria shall not exceed the following:
(A) One hundred twenty-five (125) per one hundred (100) milliliters as a geometric mean based on not less than five (5) samples equally spaced over a thirty (30) day period.
(B) Two hundred thirty-five (235) per one hundred (100) milliliters in any one (1) sample in a thirty (30) day period, except that in cases where there are at least ten (10) samples at a given site, up to ten percent (10%) of the samples may exceed two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters where the:
(i) E. coli exceedances are incidental and attributable solely to E. coli resulting from the discharge of treated wastewater from a wastewater treatment plant as defined at IC 13-11-2-258; and
(ii) criterion in clause (A) is met.
However, a single sample shall be used for making beach notification and closure decisions.
If a geometric mean cannot be calculated because five (5) equally spaced samples are not available, then the criterion stated in clause (B) must be met.
(4) For demonstrating compliance with wastewater treatment requirements, sanitary wastewater dischargers shall ensure the following:
(A) The concentration of E. coli in the undiluted discharge does not exceed one hundred twenty-five (125) cfu or MPN per one hundred (100) milliliters as a geometric mean of the effluent samples taken in a calendar month.
(B) Not more than ten percent (10%) of all samples when not less than ten (10) samples are taken and analyzed for E. coli in a calendar month exceed two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters as a daily maximum. Under this clause, the calculation of ten percent (10%) of the samples taken shall be limited to the lowest whole number result.
(5) Effluent limits to implement the criteria in subdivision (3) during the recreational season shall be established in NPDES permits by incorporating the following that are to be applied to the undiluted discharge:
(A) The concentration of E. coli in the undiluted discharge shall not exceed one hundred twenty-five (125) cfu or MPN per one hundred (100) milliliters as a geometric mean of the effluent samples taken in a calendar month.
(B) Not more than ten percent (10%) of all samples in a calendar month exceed two hundred thirty-five (235) cfu or MPN per one hundred (100) milliliters as a daily maximum. Under this clause, the calculation of ten percent (10%) of the samples taken shall be limited to the lowest whole number result.
(e) This subsection establishes surface water quality for public water supply. In addition to subsections (a) and (d), the following criteria are established to protect the surface water quality at the point at which water is withdrawn for treatment for public supply:
(1) The coliform bacteria group shall not exceed the following:
(A) Five thousand (5,000) per one hundred (100) milliliters as a monthly average value (either MPN or MF count).
(B) Five thousand (5,000) per one hundred (100) milliliters in more than twenty percent (20%) of the samples examined during any month.
(C) Twenty thousand (20,000) per one hundred (100) milliliters in more than five percent (5%) of the samples examined during any month.
(2) Taste and odor producing substances, other than naturally occurring, shall not interfere with the production of a finished water by conventional treatment consisting of the following:
(A) Coagulation.
(B) Sedimentation.
(C) Filtration.
(D) Disinfection.
(3) The concentrations of either chloride or sulfate shall not exceed two hundred fifty (250) milligrams per liter unless due to naturally occurring sources.
(4) The concentration of dissolved solids shall not exceed seven hundred fifty (750) milligrams per liter unless due to naturally occurring sources. A specific conductance of one thousand two hundred (1,200) micromhos per centimeter (at twenty-five (25) degrees Celsius) may be considered equivalent to a dissolved solids concentration of seven hundred fifty (750) milligrams per liter.
(5) Surface waters shall be considered acceptable for public water supply if radium-226 and strontium-90 are present in amounts not exceeding three (3) and ten (10) picocuries per liter, respectively. In the known absence of strontium-90 and alpha emitters, the water supply is acceptable when the gross beta concentrations do not exceed one thousand (1,000) picocuries per liter.
(6) Chemical constituents in the waters shall not be present in such levels as to prevent, after conventional treatment, meeting the drinking water standards contained in 327 IAC 8-2, due to other than natural causes.
(f) This subsection establishes surface water quality for industrial water supply. In addition to subsection (a), the criterion to ensure protection of water quality at the point at which water is withdrawn for use (either with or without treatment) for industrial cooling and processing is that, other than from naturally occurring sources, the dissolved solids shall not exceed seven hundred fifty (750) milligrams per liter at any time. A specific conductance of one thousand two hundred (1,200) micromhos per centimeter (at twenty-five (25) degrees Celsius) may be considered equivalent to a dissolved solids concentration of seven hundred fifty (750) milligrams per liter.
(g) This subsection establishes surface water quality for agricultural uses. The criteria to ensure water quality conditions necessary for agricultural use are the same as those in subsection (a).
(h) This subsection establishes surface water quality for limited uses. The quality of waters classified for limited uses under section 3(a)(5) of this rule shall, at a minimum, meet the following criteria:
(1) The criteria contained in subsection (a).
(2) The criteria contained in subsection (d).
(3) The criteria contained in subsection (f), where applicable.
(4) The waters must be aerobic at all times.
(5) Notwithstanding subdivisions (1) through (4), the quality of a limited use stream at the point where it becomes physically or chemically capable of supporting a higher use or at its interface with a higher use water segment shall meet the criteria that are applicable to the higher use water.
(Water Pollution Control Division; 327 IAC 2-1-6; filed Sep 24, 1987, 3:00 p.m.: 11 IR 581; filed Feb 1, 1990, 4:30 p.m.: 13 IR 1020; errata, 13 IR 1861; errata filed Jul 6, 1990, 5:00 p.m.: 13 IR 2003; filed Feb 26, 1993, 5:00 p.m.: 16 IR 1725; errata filed May 7, 1993, 4:00 p.m.: 16 IR 2189; filed Jan 14, 1997, 12:00 p.m.: 20 IR 1348; errata filed Aug 11, 1997, 4:15 p.m.: 20 IR 3376; filed Feb 14, 2005, 10:05 a.m.: 28 IR 2047; errata filed Apr 6, 2006, 2:48 p.m.: 29 IR 2546; errata, 29 IR 3027; filed Mar 18, 2008, 2:26 p.m.: 20080416-IR-327060573FRA; filed May 22, 2008, 10:40 a.m.: 20080618-IR-327070185FRA; filed Jul 9, 2012, 2:54 p.m.: 20120808-IR-327110320FRA; filed Nov 10, 2014, 1:51 p.m.: 20141210-IR-327130290FRA)