Arclin U.S.A., LLC.- Dodson Facility — NPDES permit LA0007501: limits, due date and EPA's record

Industrial Organic Chemicals, major discharger, Dodson, Louisiana. NPDES permit LA0007501, in force until Jul 31, 2030. Last 12 months: over a limit once (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period ending	Parameter	Reported	Limit	Over by
December 2025	Coliform, fecal general, monthly geometric mean	250 #/100mL	≤ 200 #/100mL	25%

Limits in force (165)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. fahrenheit	daily maximum	≤ 100.5 deg F	all year	001
BOD, 5-day, 20 deg. C	monthly average	≤ 47.36 mg/L	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 126.48 mg/L	all year	001
pH	minimum	report only (SU)	all year	001
pH	maximum	report only (SU)	all year	001
Solids, total suspended	monthly average	≤ 57.76 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 186.52 mg/L	all year	001
Nitrogen, total [as N]	monthly average	report only (ug/L)	all year	001
Nitrogen, total [as N]	daily maximum	report only (ug/L)	all year	001
Nitrogen, Kjeldahl, total [as N]	daily maximum	≤ 3 mg/L	all year	001
Phosphorus, total [as P]	monthly average	report only (ug/L)	all year	001
Phosphorus, total [as P]	daily maximum	report only (ug/L)	all year	001
Copper, total [as Cu]	monthly average	≤ 9.41 ug/L	all year	001
Copper, total [as Cu]	daily maximum	≤ 22.33 ug/L	all year	001
Carbon tetrachloride	monthly average	≤ 18 ug/L	all year	001
Carbon tetrachloride	daily maximum	≤ 38 ug/L	all year	001
1,2-Dichloroethane	monthly average	≤ 68 ug/L	all year	001
1,2-Dichloroethane	daily maximum	≤ 211 ug/L	all year	001
Chloroform	monthly average	≤ 21 ug/L	all year	001
Chloroform	daily maximum	≤ 46 ug/L	all year	001
Toluene	monthly average	≤ 26 ug/L	all year	001
Toluene	daily maximum	≤ 80 ug/L	all year	001
Benzene	monthly average	≤ 37 ug/L	all year	001
Benzene	daily maximum	≤ 136 ug/L	all year	001
Acenaphthylene	monthly average	≤ 22 ug/L	all year	001
Acenaphthylene	daily maximum	≤ 59 ug/L	all year	001
Acenaphthene	monthly average	≤ 22 ug/L	all year	001
Acenaphthene	daily maximum	≤ 59 ug/L	all year	001
Acrylonitrile	monthly average	≤ 96 ug/L	all year	001
Acrylonitrile	daily maximum	≤ 242 ug/L	all year	001
Anthracene	monthly average	≤ 22 ug/L	all year	001
Anthracene	daily maximum	≤ 59 ug/L	all year	001
Benzo[b]fluoranthene	monthly average	≤ 23 ug/L	all year	001
Benzo[b]fluoranthene	daily maximum	≤ 61 ug/L	all year	001
Benzo[k]fluoranthene	monthly average	≤ 22 ug/L	all year	001
Benzo[k]fluoranthene	daily maximum	≤ 59 ug/L	all year	001
Benzo[a]pyrene	monthly average	≤ 23 ug/L	all year	001
Benzo[a]pyrene	daily maximum	≤ 61 ug/L	all year	001
Chlorobenzene	monthly average	≤ 15 ug/L	all year	001
Chlorobenzene	daily maximum	≤ 28 ug/L	all year	001
Chrysene	monthly average	≤ 22 ug/L	all year	001
Chrysene	daily maximum	≤ 59 ug/L	all year	001
Diethyl phthalate	monthly average	≤ 81 ug/L	all year	001
Diethyl phthalate	daily maximum	≤ 203 ug/L	all year	001
Dimethyl phthalate	monthly average	≤ 19 ug/L	all year	001
Dimethyl phthalate	daily maximum	≤ 47 ug/L	all year	001
Ethylbenzene	monthly average	≤ 32 ug/L	all year	001
Ethylbenzene	daily maximum	≤ 108 ug/L	all year	001
Fluoranthene	monthly average	≤ 25 ug/L	all year	001
Fluoranthene	daily maximum	≤ 68 ug/L	all year	001
Fluorene	monthly average	≤ 22 ug/L	all year	001
Fluorene	daily maximum	≤ 59 ug/L	all year	001
Hexachlorobutadiene	monthly average	≤ 1.54 ug/L	all year	001
Hexachlorobutadiene	daily maximum	≤ 3.66 ug/L	all year	001
Hexachloroethane	monthly average	≤ 21 ug/L	all year	001
Hexachloroethane	daily maximum	≤ 54 ug/L	all year	001
Methyl chloride [Chloromethane]	monthly average	≤ 86 ug/L	all year	001
Methyl chloride [Chloromethane]	daily maximum	≤ 190 ug/L	all year	001
Methylene chloride	monthly average	≤ 40 ug/L	all year	001
Methylene chloride	daily maximum	≤ 89 ug/L	all year	001
Nitrobenzene	monthly average	≤ 27 ug/L	all year	001
Nitrobenzene	daily maximum	≤ 68 ug/L	all year	001
Phenanthrene	monthly average	≤ 22 ug/L	all year	001
Phenanthrene	daily maximum	≤ 59 ug/L	all year	001
Pyrene	monthly average	≤ 25 ug/L	all year	001
Pyrene	daily maximum	≤ 67 ug/L	all year	001
Tetrachloroethylene	monthly average	≤ 22 ug/L	all year	001
Tetrachloroethylene	daily maximum	≤ 56 ug/L	all year	001
1,1-Dichloroethane	monthly average	≤ 22 ug/L	all year	001
1,1-Dichloroethane	daily maximum	≤ 59 ug/L	all year	001
1,1-Dichloroethylene	monthly average	≤ 7.41 ug/L	all year	001
1,1-Dichloroethylene	daily maximum	≤ 17.63 ug/L	all year	001
1,1,1-Trichloroethane	monthly average	≤ 21 ug/L	all year	001
1,1,1-Trichloroethane	daily maximum	≤ 54 ug/L	all year	001
1,1,2-Trichloroethane	monthly average	≤ 21 ug/L	all year	001
1,1,2-Trichloroethane	daily maximum	≤ 54 ug/L	all year	001
Benzo[a]anthracene	monthly average	≤ 22 ug/L	all year	001
Benzo[a]anthracene	daily maximum	≤ 59 ug/L	all year	001
1,2-Dichlorobenzene	monthly average	≤ 77 ug/L	all year	001
1,2-Dichlorobenzene	daily maximum	≤ 163 ug/L	all year	001
1,2-Dichloropropane	monthly average	≤ 153 ug/L	all year	001
1,2-Dichloropropane	daily maximum	≤ 230 ug/L	all year	001
trans-1,2-Dichloroethylene	monthly average	≤ 21 ug/L	all year	001
trans-1,2-Dichloroethylene	daily maximum	≤ 54 ug/L	all year	001
1,2,4-Trichlorobenzene	monthly average	≤ 68 ug/L	all year	001
1,2,4-Trichlorobenzene	daily maximum	≤ 140 ug/L	all year	001
1,3-Dichlorobenzene	monthly average	≤ 31 ug/L	all year	001
1,3-Dichlorobenzene	daily maximum	≤ 44 ug/L	all year	001
1,4-Dichlorobenzene	monthly average	≤ 15 ug/L	all year	001
1,4-Dichlorobenzene	daily maximum	≤ 28 ug/L	all year	001
2-Chlorophenol	monthly average	≤ 31 ug/L	all year	001
2-Chlorophenol	daily maximum	≤ 98 ug/L	all year	001
2-Nitrophenol	monthly average	≤ 41 ug/L	all year	001
2-Nitrophenol	daily maximum	≤ 69 ug/L	all year	001
2,4-Dichlorophenol	monthly average	≤ 39 ug/L	all year	001
2,4-Dichlorophenol	daily maximum	≤ 112 ug/L	all year	001
2,4-Dimethylphenol	monthly average	≤ 18 ug/L	all year	001
2,4-Dimethylphenol	daily maximum	≤ 36 ug/L	all year	001
2,4-Dinitrotoluene	monthly average	≤ 113 ug/L	all year	001
2,4-Dinitrotoluene	daily maximum	≤ 285 ug/L	all year	001
2,4-Dinitrophenol	monthly average	≤ 71 ug/L	all year	001
2,4-Dinitrophenol	daily maximum	≤ 123 ug/L	all year	001
2,6-Dinitrotoluene	monthly average	≤ 255 ug/L	all year	001
2,6-Dinitrotoluene	daily maximum	≤ 641 ug/L	all year	001
4-Nitrophenol	monthly average	≤ 72 ug/L	all year	001
4-Nitrophenol	daily maximum	≤ 124 ug/L	all year	001
4,6-Dinitro-o-cresol	monthly average	≤ 78 ug/L	all year	001
4,6-Dinitro-o-cresol	daily maximum	≤ 277 ug/L	all year	001
2,3,7,8-Tetrachlorodibenzo-p-dioxin	monthly average	report only (ug/L)	all year	001
2,3,7,8-Tetrachlorodibenzo-p-dioxin	daily maximum	report only (ug/L)	all year	001
Phenol	monthly average	≤ 15 ug/L	all year	001
Phenol	daily maximum	≤ 26 ug/L	all year	001
Naphthalene	monthly average	≤ 22 ug/L	all year	001
Naphthalene	daily maximum	≤ 59 ug/L	all year	001
Di[2-ethylhexyl] phthalate [DEHP]	monthly average	≤ 103 ug/L	all year	001
Di[2-ethylhexyl] phthalate [DEHP]	daily maximum	≤ 279 ug/L	all year	001
Di-n-butyl phthalate	monthly average	≤ 27 ug/L	all year	001
Di-n-butyl phthalate	daily maximum	≤ 57 ug/L	all year	001
Vinyl chloride	monthly average	≤ 5.75 ug/L	all year	001
Vinyl chloride	daily maximum	≤ 13.68 ug/L	all year	001
Trichloroethylene	monthly average	≤ 21 ug/L	all year	001
Trichloroethylene	daily maximum	≤ 54 ug/L	all year	001
Hexachlorobenzene	monthly average	≤ .0032 ug/L	all year	001
Hexachlorobenzene	daily maximum	≤ .0076 ug/L	all year	001
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
1,3-Dichloropropylene	monthly average	≤ 12 ug/L	all year	001
1,3-Dichloropropylene	daily maximum	≤ 28.55 ug/L	all year	001
Mercury, total [as Hg]	monthly average	report only (ug/L)	all year	001
Mercury, total [as Hg]	daily maximum	report only (ug/L)	all year	001
Coliform, fecal general	monthly geometric mean	≤ 200 #/100mL	all year	001
Coliform, fecal general	daily maximum	≤ 400 #/100mL	all year	001
pH range excursions, > 60 minutes	monthly total	≤ 0 occur/mo	all year	001
pH range excursions, monthly total accum	monthly total	≤ 446 min	all year	001
Chloroethane	monthly average	≤ 104 ug/L	all year	001
Chloroethane	daily maximum	≤ 268 ug/L	all year	001
Temperature, water deg. fahrenheit	daily maximum	≤ 100.5 deg F	all year	002
pH	minimum	report only (SU)	all year	002
pH	maximum	report only (SU)	all year	002
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	002
pH range excursions, > 60 minutes	monthly total	≤ 0 occur/mo	all year	002
pH range excursions, monthly total accum	monthly total	≤ 446 min	all year	002
Whole effluent toxicity	monthly average minimum	≥ 46 %	all year	TOX
Whole effluent toxicity	monthly average minimum	≥ 46 %	all year	TOX
Whole effluent toxicity	7-day minimum	≥ 46 %	all year	TOX
Whole effluent toxicity	7-day minimum	≥ 46 %	all year	TOX
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia	monthly average minimum	report only (pass=0;fail=1)	all year	TOX
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia	7-day minimum	report only (pass=0;fail=1)	all year	TOX
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas	monthly average minimum	report only (pass=0;fail=1)	all year	TOX
Pass/Fail Static Renewal 7Day Chronic Pimephales promelas	7-day minimum	report only (pass=0;fail=1)	all year	TOX
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia	monthly average minimum	report only (pass=0;fail=1)	all year	TOX
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia	7-day minimum	report only (pass=0;fail=1)	all year	TOX
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas	monthly average minimum	report only (pass=0;fail=1)	all year	TOX
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas	7-day minimum	report only (pass=0;fail=1)	all year	TOX
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	monthly average minimum	report only (%)	all year	TOX
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	7-day minimum	report only (%)	all year	TOX
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas	monthly average minimum	report only (%)	all year	TOX
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas	7-day minimum	report only (%)	all year	TOX
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	monthly average minimum	report only (%)	all year	TOX
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia	7-day minimum	report only (%)	all year	TOX
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas	monthly average minimum	report only (%)	all year	TOX
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas	7-day minimum	report only (%)	all year	TOX
Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia	maximum	report only (%)	all year	TOX
Coef Of Var Static Renewal 7Day Chronic Pimephales promelas	maximum	report only (%)	all year	TOX

New limits from Aug 1, 2028

Parameter	New limit	New or tighter	Median, last 12 months	× new limit
1,2-Dichloroethane, daily maximum	206.71 ug/L	tighter	0 ug/L (4 values)	0×
2,3,7,8-Tetrachlorodibenzo-p-dioxin, daily maximum	0.000022 ug/L	new	0 ug/L (4 values)	0×
2,3,7,8-Tetrachlorodibenzo-p-dioxin, monthly average	0.0000092 ug/L	new	0 ug/L (4 values)	0×
Carbon tetrachloride, daily maximum	36.48 ug/L	tighter	0 ug/L (4 values)	0×
Carbon tetrachloride, monthly average	15.38 ug/L	tighter	0 ug/L (4 values)	0×
Mercury, total [as Hg], daily maximum	0.135 ug/L	new	0 ug/L (4 values)	0×
Mercury, total [as Hg], monthly average	0.057 ug/L	new	0 ug/L (4 values)	0×

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/LA0007501 · MCP: https://passage-data.com/mcp