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This website publishes administrative rules on their effective dates, as designated by the adopting state agencies, colleges, and universities.

Rule 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.

OMZA3
ChemicalForm1Units2Drinking
Ohio riverLake Erie
AcenaphtheneTµg/l70
AcroleinTµg/l3.0
Acrylonitrile5Tµg/l0.51
Alachlor Tµg/l2.0a2.0a
Aldrin5Tµg/l7.7*10-6
AnthraceneTµg/l300
Antimony5TRµg/l5.66.0a
ArsenicTRµg/l10a10a
AsbestosTMf/l7.0a7.0a
AtrazineTµg/l3.0a3.0a
Barium5TRµg/l1,0002,000a
Benzene5Tµg/l5.0a5.0a
Benzidine5Tµg/l0.00086
Benzo(a)anthracene5Tµg/l0.0120.2a
Benzo(a)pyrene5Tµg/l0.0012
Benzo(b)fluoranthene5Tµg/l0.012
Benzo(k)fluoranthene5Tµg/l0.038
BerylliumTRµg/l4.0a4.0a
BromateTµg/l10a10a
Bromoform (Tribromomethane)5Tµg/l43
Butylbenzyl phthalateTµg/l0.10
CadmiumTRµg/l5.0a5.0a
CarbofuranTµg/l40a40a
Carbon tetrachloride5Tµg/l2.35.0a
ChloramineTµg/l4,000a4,000a
Chlordane5Tµg/l0.00310.00025
ChloridesTmg/l250a250a
ChlorineTµg/l4,000a4,000a
Chlorine dioxideTµg/l800a800a
ChloriteTµg/l1,000a1,000a
Chloroacetic acid6Tµg/l60a60a
ChlorobenzeneTµg/l100a100a
Chlorodibromomethane5Tµg/l4.0
Bis(2-Chloro-1-methylethyl) etherTµg/l200
Bis(2-Chloroethyl)ether5Tµg/l0.30
Chloroform5Tµg/l57
bis(2-Chloroisopropyl)etherTµg/l1,400
bis(2-Chloromethyl)ether5Tµg/l0.0015
2-ChloronaphthaleneTµg/l800
2-ChlorophenolTµg/l30
ChromiumTRµg/l100a100a
Chrysene5Tµg/l0.038
Cyanidefreeµg/l4.04.0
2,4-D (2,4-Dichlorophenoxy-acetic acid) Tµg/l70a70a
DalaponTµg/l200a200a
4,4'-DDD5Tµg/l0.0012
4,4'-DDE5Tµg/l0.00018
4,4'-DDT5Tµg/l0.00030.00015
Dibenzo(a,h)anthracene5Tµg/l0.0012
DibromochloropropaneTµg/l0.2a0.2a
Di-n-butyl phthalateTµg/l20
Dichloroacetic acid6Tµg/l60a60a
1,2-DichlorobenzeneTµg/l420600a
1,3-DichlorobenzeneTµg/l7.0
1,4-DichlorobenzeneTµg/l6375a
3,3'-Dichlorobenzidine5Tµg/l0.21
Dichlorobromomethane5Tµg/l5.5
1,2-Dichloroethane5Tµg/l3.85.0a
1,1-Dichloroethylene5Tµg/l0.577.0a
cis-1,2-DichloroethyleneTµg/l70a70a
trans-1,2-DichloroethyleneTµg/l100a100a
2,4-DichlorophenolTµg/l10
1,2-Dichloropropane5Tµg/l5.0a5.0a
1,3-DichloropropeneTµg/l2.7
Dieldrin5Tµg/l1.2*10-50.0000065
Di(2-ethylhexyl)adipateTµg/l400a400a
Diethyl phthalateTµg/l600
2,4-DimethylphenolTµg/l100100
Dimethyl phthalateTµg/l2,000
4,6-Dinitro-o-cresol (4,6-Dinitro-2-methylphenol) Tµg/l2.0
Dinitrophenols4Tµg/l10
2,4-DinitrophenolTµg/l1010
2,4-Dinitrotoluene5Tµg/l0.49
DinosebTµg/l7.0a7.0a
1,2-Diphenylhydrazine5Tµg/l0.30
DiquatTµg/l20a20a
Dissolved solidsTmg/l750/500a,b750/500a,b
alpha-Endosulfan7Tµg/l20
beta-Endosulfan7Tµg/l20
Endosulfan sulfate7Tµg/l20
EndothallTµg/l100a100a
Endrin8Tµg/l0.032.0a
Endrin aldehyde8Tµg/l0.29
EthylbenzeneTµg/l68700a
Ethylene dibromide (EDB)Tµg/l0.050a0.050a
bis(2-Ethylhexyl)phthalate5Tµg/l3.26.0a
FluorantheneTµg/l20
FluoreneTµg/l50
FluorideTµg/l1,0004,000a
GlyphosateTµg/l700a700a
Heptachlor5Tµg/l5.9*10-50.4a
Heptachlor epoxide5Tµg/l0.000320.2a
Hexachlorobenzene5Tµg/l0.000790.00045
Hexachlorobutadiene5Tµg/l0.10
alpha-Hexachlorocyclohexane5Tµg/l0.0036
beta-Hexachlorocyclohexane5Tµg/l0.08
gamma-Hexachlorocyclohexane (Lindane)5Tµg/l0.200.20a
Hexachlorocyclohexane - technical grade5Tµg/l0.066
HexachlorocyclopentadieneTµg/l4.050a
Hexachloroethane5Tµg/l1.01.0
Indeno(1,2,3-c,d)pyrene5Tµg/l0.012
IronSµg/l300a300a
Isophorone5Tµg/l340
MercuryTRµg/l0.0120.0031
MethoxychlorTµg/l0.0240a
Methyl bromideTµg/l47
3-Methyl-4-chlorophenolTµg/l500
Methylene chloride5Tµg/l5.0a5.0a
NickelTRµg/l610
Nitrate-N + Nitrite-NTµg/l10,000a10,000a
Nitrite-NTµg/l1,000a1,000a
NitrobenzeneTµg/l10
Nitrosoamines5Tµg/l0.0080
N-Nitrosodibutylamine5Tµg/l0.063
N-Nitrosodiethylamine5Tµg/l0.0080
N-Nitrosodimethylamine5Tµg/l0.0069
N-Nitrosodi-n-propylamine5Tµg/l0.050
N-Nitrosodiphenylamine5Tµg/l33
N-Nitrosodipyrrolidine5Tµg/l0.16
Oxamyl (Vydate)Tµg/l200a200a
PentachlorobenzeneTµg/l0.1
Pentachlorophenol5Tµg/l0.31.0a
PhenolTµg/l4,000
PicloramTµg/l500a500a
Polychlorinated biphenyls5Tµg/l0.000640.000026
PyreneTµg/l20
SeleniumTRµg/l50a50a
Silvex (2,4,5-TP, 2-[2,4,5-Trichlorophenoxy]propionic acidTµg/l1050a
SimazineTµg/l4.0a4.0a
StyreneTµg/l100a100a
SulfatesTmg/l250a250a
1,2,4,5-TetrachlorobenzeneTµg/l0.03
2,3,7,8-Tetrachlorodibenzo-p-dioxin5Tµg/l5.0*10-85.0*10-8
1,1,2,2-Tetrachloroethane5Tµg/l1.7
Tetrachloroethylene5Tµg/l5.0a5.0a
ThalliumTRµg/l1.7
TolueneTµg/l5757
Toxaphene5Tµg/l0.00280.000068
Trichloroacetic acid6Tµg/l60a60a
1,2,4-Trichlorobenzene5Tµg/l0.7170a
1,1,1-TrichloroethaneTµg/l200a200a
1,1,2-Trichloroethane5Tµg/l5.0a5.0a
Trichloroethylene5Tµg/l5.0a5.0a
2,4,5-TrichlorophenolTµg/l300
2,4,6-Trichlorophenol5Tµg/l14
Vinyl chloride5Tµg/l0.222.0a
XylenesTµg/l10,000a10,000a
ZincTµg/l7,400

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); 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 chloroacetic acid, dichloroacetic acid and trichloroacetic acid.

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

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.

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.

ChemicalForm1Units2OMZA3
ArsenicTRµg/l100
BerylliumTRµg/l100
CadmiumTRµg/l50
Total chromiumTRµg/l100
CopperTRµg/l500
FluorideTµg/l2,000
IronTRµg/l5,000
LeadTRµg/l100
MercuryTRµg/l10
NickelTRµg/l200
Nitrates+nitritesTmg/l100
SeleniumTRµg/l50
ZincTRµg/l25,000

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.

Supplemental Information

Authorized By: 6111.041
Amplifies: 6111.041
Five Year Review Date: 1/18/2026
Prior Effective Dates: 2/14/1978, 4/4/1985, 8/19/1985, 4/30/1987, 5/1/1990, 4/26/1997, 10/31/1997, 7/31/1998, 7/31/1999, 2/22/2002, 12/30/2002, 10/1/2014, 8/10/2016, 2/6/2017