Ohio Admin. Code 3745-1-33 - Water quality criteria for water supply use designations

[Comment: For dates of non-regulatory government publications, publications of recognized organizations and associations, federal rules and federal statutory provisions referenced in this rule, see rule 3745-1-03 of the Administrative Code.]

(A) Human health water quality criteria [public water supply].

(1) The chemical specific criteria listed in table 33-1 of this rule, or site-specific modifications thereof, apply as "Outside Mixing Zone Averages" and shall apply to all water bodies located within five hundred yards of drinking water intakes. For the purpose of setting water quality based effluent limits, these criteria shall be met after the effluent and the receiving water are reasonably well mixed as provided in rules 3745-1-06 and 3745-2-05 of the Administrative Code.

(2) Water bodies located within the Ohio river drainage basin. Any methodologies and procedures acceptable under 40 C.F.R. 131 , effective July 1, 2019 may be used when developing or revising human health water quality criteria or implementing narrative criteria contained in rule 3745-1-04 of the Administrative Code. For any pollutant for which it is demonstrated that a methodology or procedure cited in this rule is not scientifically defensible, the director may apply an alternative methodology or procedure acceptable under 40 C.F.R. 131 when developing water quality criteria.

(3) Water bodies located within the lake Erie drainage basin. The methodologies contained in rules 3745-1-41 and 3745-1-42 of the Administrative Code shall be used when adopting or revising numeric human health criteria and when implementing the narrative water quality criteria contained in rule 3745-1-04 of the Administrative Code. For pollutants listed in table 33-2 of this rule, any methodologies and procedures acceptable under 40 C.F.R. 131 may be used when developing water quality criteria or implementing narrative criteria. For any pollutant other than those in table 33-2 of this rule, for which it is demonstrated that a methodology or procedure cited in this rule is not scientifically defensible, the director may apply an alternative methodology or procedure acceptable under 40 C.F.R. 131 when developing water quality criteria.

Table 33-1. Water quality criteria for the protection of human health [public water supply].

OMZA3
Chemical	Form1	Units2	Drinking
Ohio river	Lake Erie
Acenaphthene	T	µg/l	1,200 70
Acrolein	T	µg/l	320 3.0
Acrylonitrile5	T	µg/l	0.59 0.51
Alachlor	T	µg/l	2.0a	2.0a
Aldicarb6	T	µg/l	7.0 a
Aldicarb sulfone6	T	µg/l	7.0 a
Aldicarb sulfoxide6	T	µg/l	7.0 a
Aldrin5	T	µg/l	0.0013 7.7	*10-6
Anthracene	T	µg/l	9,600 300
Antimony5	TR	µg/l	6.0 a 5.6	6.0a
Arsenic	TR	µg/l	10a	10a
Asbestos	T	Mf/l	7.0a	7.0a
Atrazine	T	µg/l	3.0a	3.0a
Barium5	TR	µg/l	2,000a 1,000	2,000a
Benzene5	T	µg/l	5.0a	12 5.0a
Benzidine5	T	µg/l	0.0012 0.00086
Benzo(a)anthracene5	T	µg/l	0.044 0.012	0.2a
Benzo(a)pyrene5	T	µg/l	0.044 0.0012
Benzo(b)fluoranthene5	T	µg/l	0.044 0.012
Benzo(k)fluoranthene5	T	µg/l	0.044 0.038
Beryllium	TR	µg/l	4.0a	4.0a
Bromate	T	µg/l	10a	10a
Bromoform (Tribromomethane)5	T	µg/l	43
Butylbenzyl phthalate	T	µg/l	3,000 0.10
Cadmium	TR	µg/l	5.0a	5.0a
Carbofuran	T	µg/l	40a	40a
Carbon tetrachloride5	T	µg/l	2.5 2.3	5.0a
Chloramine	T	µg/l	4,000a	4,000a
Chlordane5	T	µg/l	0.021 0.0030	1.00025
Chlorides	T	mg/l	250a	250a
Chlorine	T	µg/l	4,000a	4,000a
Chlorine dioxide	T	µg/l	800a	800a
Chlorite	T	µg/l	1,000a	1,000a
Chloroacetic acid7 6	T	µg/l	60a	a 60
Chlorobenzene	T	µg/l	100a	470 100a
Chlorodibromomethane5	T	µg/l	4.1 4.0
Bis(2-Chloro-1-methylethyl) ether	T	µg/l	200
Bis(2-Chloroethyl)ether5	T	µg/l	0.31 0.30
Chloroform5	T	µg/l	57
bis(2-Chloroisopropyl)ether	T	µg/l	1,400
bis(2-Chloromethyl)ether5	T	µg/l	0.0013 0.0015
2-Chloronaphthalene	T	µg/l	1,700 800
2-Chlorophenol	T	µg/l	120 30
Chromium	TR	µg/l	100a	a 100
Chrysene5	T	µg/l	0.044 0.038
Cyanide	free	µg/l	200a 4.0	600 4.0
2,4-D (2,4-Dichlorophenoxy-acetic acid)	T	µg/l	70a	70a
Dalapon	T	µg/l	200a	200a
4,4'-DDD5	T	µg/l	0.0083 0.0012
4,4'-DDE5	T	µg/l	0.0059 0.00018
4,4'-DDT5	T	µg/l	0.0059 0.000.3	00015
Dibenzo(a,h)anthracene5	T	µg/l	0.044 0.0012
Dibromochloropropane	T	µg/l	0.2a	0.2a
Di-n-butyl phthalate	T	µg/l	2,700 20
Dichloroacetic acid7 6	T	µg/l	60a	60a
1,2-Dichlorobenzene	T	µg/l	600a 420	600a
1,3-Dichlorobenzene	T	µg/l	400 7.0
1,4-Dichlorobenzene	T	µg/l	75a 63	75a
3,3'-Dichlorobenzidine5	T	µg/l	0.40 0.21
Dichlorobromomethane5	T	µg/l	5.6 5.5
1,2-Dichloroethane5	T	µg/l	3.8	5.0a
1,1-Dichloroethylene5	T	µg/l	0.57	7.0a
cis-1,2-Dichloroethylene	T	µg/l	70a	70a
trans-1,2-Dichloroethylene	T	µg/l	100a	100a
2,4-Dichlorophenol	T	µg/l	93 10
1,2-Dichloropropane5	T	µg/l	5.0a	5.0a
1,3-Dichloropropene	T	µg/l	10 2.7
Dieldrin5	T	µg/l	0.0014 1.2 *10-5	0.0000065
Di(2-ethylhexyl)adipate	T	µg/l	400a	400a
Diethyl phthalate	T	µg/l	23,000 600
2,4-Dimethylphenol	T	µg/l	540 100	450 100
Dimethyl phthalate	T	µg/l	310,000 2,000
4,6-Dinitro-o-cresol (4,6-Dinitro-2-methylphenol)	T	µg/l	13 2.0
Dinitrophenols4	T	µg/l	70 10
2,4-Dinitrophenol	T	µg/l	-- 10	55 10
2,4-Dinitrotoluene5	T	µg/l	1.1 0.49
Dinoseb	T	µg/l	7.0a	7.0a
1,2-Diphenylhydrazine5	T	µg/l	0.40 0.30
Diquat	T	µg/l	20a	20a
Dissolved solids	T	mg/l	750/500a,b	750/500a, b
alpha-Endosulfan8 7	T	µg/l	110 20
beta-Endosulfan8 7	T	µg/l	110 20
Endosulfan sulfate8 7	T	µg/l	110 20
Endothall	T	µg/l	100a	100a
Endrin9 8	T	µg/l	0.76 0.03	2.0a
Endrin aldehyde9 8	T	µg/l	0.76 0.29
Ethylbenzene	T	µg/l	700a 68	700a
Ethylene dibromide (EDB)	T	µg/l	0.050a	0.050a
bis(2-Ethylhexyl)phthalate5	T	µg/l	6.0 a 3.2	6.0a
Fluoranthene	T	µg/l	300 20
Fluorene	T	µg/l	1,300 50
Fluoride	T	µg/l	4,000a 1,000	40,000a
Glyphosate	T	µg/l	700a	700a
Heptachlor5	T	µg/l	0.0021 5.900-5	* 1.4-a
Heptachlor epoxide5	T	µg/l	0.0010 0.00032	0.2a
Hexachlorobenzene5	T	µg/l	0.0075 0.00079	0.00045
Hexachlorobutadiene5	T	µg/l	4.4 0.10
alpha-Hexachlorocyclohexane5	T	µg/l	0.039 0.0036
beta-Hexachlorocyclohexane5	T	µg/l	0.14 0.08
gamma-Hexachlorocyclohexane (Lindane)5	T	µg/l	0.19 0.20	0.47 0.20a
Hexachlorocyclohexane - technical grade5	T	µg/l	0.12 0.066
Hexachlorocyclopentadiene	T	µg/l	50a 4.0	50a
Hexachloroethane5	T	µg/l	19 1.0	5.3 1.0
Indeno(1,2,3-c,d)pyrene5	T	µg/l	0.044 0.012
Iron	S	µg/l	300a	300a
Isophorone5	T	µg/l	360 340
Mercury	TR	µg/l	0.012	0.0031
Methoxychlor	T	µg/l	40a 0.02	40a
Methyl bromide	T	µg/l	48 47
3-Methyl-4-chlorophenol	T	µg/l	500
Methylene chloride5	T	µg/l	5.0a	47 5.0a
Nickel	TR	µg/l	610
Nitrate-N + Nitrite-N	T	µg/l	10,000a	10,000a
Nitrite-N	T	µg/l	1,000a	1,000a
Nitrobenzene	T	µg/l	17 10
Nitrosoamines5	T	µg/l	0.0080
N-Nitrosodibutylamine5	T	µg/l	0.064 0.063
N-Nitrosodiethylamine5	T	µg/l	0.0080
N-Nitrosodimethylamine5	T	µg/l	0.0069
N-Nitrosodi-n-propylamine5	T	µg/l	0.050
N-Nitrosodiphenylamine5	T	µg/l	50 33
N-Nitrosodipyrrolidine5	T	µg/l	0.16
Oxamyl (Vydate)	T	µg/l	200a	200a
Pentachlorobenzene	T	µg/l	3.5 0.1
Pentachlorophenol5	T	mg/l µg/l	1.0 a 0.3	1.0a
Phenol	T	µg/l	21,000 4,000
Picloram	T	µg/l	500a	500a
Polychlorinated biphenyls5	T	µg/l	0.0017 0.00064	0.000026
Pyrene	T	µg/l	960 20
Selenium	TR	µg/l	50a	50a
Silvex (2,4,5-TP, 2-[2,4,5-Trichlorophenoxy]propionic acid	T	µg/l	10	50a
Simazine	T	µg/l	4.0a	4.0a
Styrene	T	µg/l	100a	100a
Sulfates	T	mg/l	250a	250a
1,2,4,5-Tetrachlorobenzene	T	µg/l	2.3 0.03
2,3,7,8-Tetrachlorodibenzo-p-dioxin5	T	pg/l µg/l	0.13 5.0 *10-8	0.0086 5.0 *10-8
1,1,2,2-Tetrachloroethane5	T	µg/l	1.7
Tetrachloroethylene5	T	µg/l	5.0a	5.0a
Thallium	TR	µg/l	1.7
Toluene	T	µg/l	1,000a 57	5,600 57
Toxaphene5	T	µg/l	0.0073 0.0028	0.00068
Trichloroacetic acid7 6	T	µg/l	60a	60a
1,2,4-Trichlorobenzene5	T	µg/l	70a 0.71	70a
1,1,1-Trichloroethane	T	µg/l	200a	200a
1,1,2-Trichloroethane5	T	µg/l	5.0a	5.0a
Trichloroethylene5	T	µg/l	5.0a	29 5.0a
2,4,5-Trichlorophenol	T	µg/l	2,600 300
2,4,6-Trichlorophenol5	T	µg/l	21 14
Vinyl chloride5	T	µg/l	2.0 a 0.22	2.0a
Xylenes	T	µg/l	10,000a	10,000a
Zinc	T	µg/l	9,100 7,400

¹ S = soluble; T = total; TR = total recoverable.

² mg/l = milligrams per liter (parts per million); µg/l = micrograms per liter (parts per billion); ng/l = nanograms per liter (parts per trillion); pg/l = picograms per liter (parts per quadrillion); Mf/l = million fibers per liter.

³ OMZA = outside mixing zone average.

⁴ The criteria for this chemical apply to the sum of all dinitrophenols.

⁵ Criteria for this chemical are based on a carcinogenic endpoint.

⁶ The criterion for this chemical applies to the sum of aldicarb, aldicarb sulfone and aldicarb sulfoxide.

^{7 6} The criterion for this chemical applies to the sum of chloroacetic acid, dichloroacetic acid and trichloroacetic acid.

^{8 7} The criteria for this chemical apply to the sum of alpha-endosulfan, beta-endosulfan and endosulfan sulfate.

^{9 8} The criteria for this chemical apply to the sum of endrin and endrin aldehyde.

^a This criterion is the maximum contaminant level (MCL) developed under the "Safe Drinking Water Act".

^b Equivalent 25ºC specific conductance values are 1200 micromhos/cm as a maximum and 800 micromhos/cm as a thirty day average.

Table 33-2. Pollutants subject to any methodologies and procedures acceptable under 40 C.F.R. 131 for water bodies located in the lake Erie drainage basin.

Alkalinity

Ammonia

Bacteria

Biochemical oxygen demand (BOD)

Chlorine

Color

Dissolved oxygen

Dissolved solids

pH

Phosphorus

Salinity

Temperature

Total and suspended solids

Turbidity

(B) Agricultural water supply criteria.

(1) The chemical-specific criteria listed in table 33-3 of this rule apply as "Outside Mixing Zone Averages." For the purpose of setting water quality based effluent limits, the criteria shall be met after the effluent and the receiving water are reasonably well mixed as provided in rules 3745-1-06 and 3745-2-05 of the Administrative Code.

(2) The water quality criteria for the protection of agricultural uses, or site-specific modifications thereof, adopted in, or developed pursuant to, this rule shall apply outside the mixing zone to all water bodies assigned the agricultural water supply use designation.

(3) For any pollutant in table 33-3 of this rule for which it is demonstrated that a methodology or procedure cited in this chapter is not scientifically defensible, the director may apply an alternative methodology or procedure acceptable under 40 C.F.R. 131 when developing water quality criteria.

Table 33-3. Statewide water quality criteria for the protection of agricultural uses.

Chemical	Form1	Units2	OMZA3
Arsenic	TR	µg/l	100
Beryllium	TR	µg/l	100
Cadmium	TR	µg/l	50
Total chromium	TR	µg/l	100
Copper	TR	µg/l	500
Fluoride	T	µg/l	2,000
Iron	TR	µg/l	5,000
Lead	TR	µg/l	100
Mercury	TR	µg/l	10
Nickel	TR	µg/l	200
Nitrates+nitrites	T	mg/l	100
Selenium	TR	µg/l	50
Zinc	TR	µg/l	25,000

¹T = total; TR = total recoverable.

²mg/l = milligrams per liter (parts per million); µg/l = micrograms per liter (parts per billion).

³OMZA = outside mixing zone average.

Notes

Ohio Admin. Code 3745-1-33

Effective: 1/18/2021
Five Year Review (FYR) Dates: 10/30/2019 and 01/18/2026
Promulgated Under: 119.03
Statutory Authority: 6111.041
Rule Amplifies: 6111.041
Prior Effective Dates: 02/14/1978, 04/04/1985, 08/19/1985, 04/30/1987, 05/01/1990, 04/26/1997, 10/31/1997, 07/31/1998, 07/31/1999, 02/22/2002, 12/30/2002, 10/01/2014, 08/10/2016, 02/06/2017