Covestro LLC — NPDES permit TX0002798: limits, due date and EPA's record

Industrial Organic Chemicals, major discharger, Chambers County, Texas. NPDES permit TX0002798, in force until Oct 31, 2027. Last 12 months: no values over a limit, 1 of 72 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (220)

Parameter	Statistic	Limit	Months	Outfall
pH	minimum	≥ 6 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Oil & Grease	daily maximum	≤ 15 mg/L	all year	002
Carbon, tot organic [TOC]	daily maximum	≤ 70 mg/L	all year	002
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	002
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	002
pH	minimum	≥ 6 SU	all year	003
pH	maximum	≤ 9 SU	all year	003
Oil & Grease	daily maximum	≤ 15 mg/L	all year	003
Carbon, tot organic [TOC]	daily maximum	≤ 70 mg/L	all year	003
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	003
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	003
pH	minimum	≥ 6 SU	all year	004
pH	maximum	≤ 9 SU	all year	004
Oil & Grease	daily maximum	≤ 15 mg/L	all year	004
Carbon, tot organic [TOC]	daily maximum	≤ 70 mg/L	all year	004
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	004
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	004
pH	minimum	≥ 6 SU	all year	006
pH	maximum	≤ 9 SU	all year	006
Oil & Grease	daily maximum	≤ 15 mg/L	all year	006
Carbon, tot organic [TOC]	daily maximum	≤ 70 mg/L	all year	006
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	006
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	006
Oxygen, dissolved [DO]	monthly minimum	≥ 4 mg/L	all year	007
Oxygen demand, chem. [high level] [COD]	daily average	report only (mg/L)	all year	007
Oxygen demand, chem. [high level] [COD]	daily maximum	report only (mg/L)	all year	007
Oxygen demand, chem. [high level] [COD]	daily average	≤ 10827 lb/d	all year	007
Oxygen demand, chem. [high level] [COD]	daily maximum	≤ 21654 lb/d	all year	007
pH	minimum	≥ 5 SU	all year	007
pH	maximum	≤ 11 SU	all year	007
Solids, total suspended	daily average	≤ 4199 lb/d	all year	007
Solids, total suspended	daily maximum	≤ 12150 lb/d	all year	007
Nitrogen, ammonia total [as N]	daily average	≤ 15 mg/L	all year	007
Nitrogen, ammonia total [as N]	daily maximum	≤ 30 mg/L	all year	007
Nitrogen, ammonia total [as N]	daily average	≤ 1251 lb/d	all year	007
Nitrogen, ammonia total [as N]	daily maximum	≤ 2502 lb/d	all year	007
Carbon, tot organic [TOC]	daily average	≤ 4253 lb/d	all year	007
Carbon, tot organic [TOC]	daily maximum	≤ 8507 lb/d	all year	007
Cyanide, free [as free]	daily average	≤ .027 mg/L	all year	007
Cyanide, free [as free]	daily maximum	≤ .056 mg/L	all year	007
Cyanide, free [as free]	daily average	≤ 2.22 lb/d	all year	007
Cyanide, free [as free]	daily maximum	≤ 4.7 lb/d	all year	007
Cyanide, total [as CN]	daily average	≤ 3.36 lb/d	all year	007
Cyanide, total [as CN]	daily maximum	≤ 9.61 lb/d	all year	007
Copper, total [as Cu]	daily average	≤ .111 mg/L	all year	007
Copper, total [as Cu]	daily maximum	≤ .236 mg/L	all year	007
Copper, total [as Cu]	daily average	≤ 10.9 lb/d	all year	007
Copper, total [as Cu]	daily maximum	≤ 23.31 lb/d	all year	007
Lead, total [as Pb]	daily average	report only (mg/L)	all year	007
Lead, total [as Pb]	daily maximum	report only (mg/L)	all year	007
Lead, total [as Pb]	daily average	≤ 4.56 lb/d	all year	007
Lead, total [as Pb]	daily maximum	≤ 11.28 lb/d	all year	007
Nickel, total [as Ni]	daily average	report only (mg/L)	all year	007
Nickel, total [as Ni]	daily maximum	report only (mg/L)	all year	007
Nickel, total [as Ni]	daily average	≤ 11.3 lb/d	all year	007
Nickel, total [as Ni]	daily maximum	≤ 28.71 lb/d	all year	007
Carbon tetrachloride	daily average	≤ 2.71 lb/d	all year	007
Carbon tetrachloride	daily maximum	≤ 6.77 lb/d	all year	007
1,2-Dichloroethane	daily average	≤ 5.64 lb/d	all year	007
1,2-Dichloroethane	daily maximum	≤ 17.71 lb/d	all year	007
Chloroform	daily average	≤ 2.46 lb/d	all year	007
Chloroform	daily maximum	≤ 6.45 lb/d	all year	007
Toluene	daily average	≤ 1.63 lb/d	all year	007
Toluene	daily maximum	≤ 4.8 lb/d	all year	007
Benzene	daily average	≤ 2.54 lb/d	all year	007
Benzene	daily maximum	≤ 8.35 lb/d	all year	007
Acenaphthylene	daily average	≤ 1.29 lb/d	all year	007
Acenaphthylene	daily maximum	≤ 3.37 lb/d	all year	007
Acenaphthene	daily average	≤ 1.29 lb/d	all year	007
Acenaphthene	daily maximum	≤ 3.37 lb/d	all year	007
Acrylonitrile	daily average	≤ 5.88 lb/d	all year	007
Acrylonitrile	daily maximum	≤ 14.71 lb/d	all year	007
Anthracene	daily average	≤ 1.29 lb/d	all year	007
Anthracene	daily maximum	≤ 3.37 lb/d	all year	007
Benzo[k]fluoranthene	daily average	≤ 1.29 lb/d	all year	007
Benzo[k]fluoranthene	daily maximum	≤ 2.37 lb/d	all year	007
Benzo[a]pyrene	daily average	≤ .0092 lb/d	all year	007
Benzo[a]pyrene	daily maximum	≤ .0195 lb/d	all year	007
Chlorobenzene	daily average	≤ 2.57 lb/d	all year	007
Chlorobenzene	daily maximum	≤ 6.28 lb/d	all year	007
Chrysene	daily average	≤ 1.29 lb/d	all year	007
Chrysene	daily maximum	≤ 3.37 lb/d	all year	007
Diethyl phthalate	daily average	≤ 4.2 lb/d	all year	007
Diethyl phthalate	daily maximum	≤ 10.47 lb/d	all year	007
Dimethyl phthalate	daily average	≤ 1.17 lb/d	all year	007
Dimethyl phthalate	daily maximum	≤ 2.9 lb/d	all year	007
Ethylbenzene	daily average	≤ 3.4 lb/d	all year	007
Ethylbenzene	daily maximum	≤ 10.18 lb/d	all year	007
Fluoranthene	daily average	≤ 1.47 lb/d	all year	007
Fluoranthene	daily maximum	≤ 3.88 lb/d	all year	007
Fluorene	daily average	≤ 1.29 lb/d	all year	007
Fluorene	daily maximum	≤ 3.37 lb/d	all year	007
Hexachlorobutadiene	daily average	≤ .81 lb/d	all year	007
Hexachlorobutadiene	daily maximum	≤ 1.71 lb/d	all year	007
Hexachloroethane	daily average	≤ 3.56 lb/d	all year	007
Hexachloroethane	daily maximum	≤ 12.9 lb/d	all year	007
Methyl chloride [Chloromethane]	daily average	≤ 5.62 lb/d	all year	007
Methyl chloride [Chloromethane]	daily maximum	≤ 13.08 lb/d	all year	007
Methylene chloride	daily average	≤ 2.38 lb/d	all year	007
Methylene chloride	daily maximum	≤ 6.54 lb/d	all year	007
Nitrobenzene	daily average	≤ 30.24 lb/d	all year	007
Nitrobenzene	daily maximum	≤ 86.08 lb/d	all year	007
Phenanthrene	daily average	≤ 1.29 lb/d	all year	007
Phenanthrene	daily maximum	≤ 3.37 lb/d	all year	007
Pyrene	daily average	≤ 1.43 lb/d	all year	007
Pyrene	daily maximum	≤ 3.7 lb/d	all year	007
Tetrachloroethylene	daily average	≤ 1.75 lb/d	all year	007
Tetrachloroethylene	daily maximum	≤ 4.85 lb/d	all year	007
1,1-Dichloroethane	daily average	≤ 1.36 lb/d	all year	007
1,1-Dichloroethane	daily maximum	≤ 3.64 lb/d	all year	007
1,1-Dichloroethylene	daily average	≤ 1.07 lb/d	all year	007
1,1-Dichloroethylene	daily maximum	≤ 2 lb/d	all year	007
1,1,1-Trichloroethane	daily average	≤ 1.31 lb/d	all year	007
1,1,1-Trichloroethane	daily maximum	≤ 3.4 lb/d	all year	007
1,1,2-Trichloroethane	daily average	≤ 1.44 lb/d	all year	007
1,1,2-Trichloroethane	daily maximum	≤ 4.28 lb/d	all year	007
Benzo[a]anthracene	daily average	≤ .092 lb/d	all year	007
Benzo[a]anthracene	daily maximum	≤ .195 lb/d	all year	007
1,2-Dichlorobenzene	daily average	≤ 6.29 lb/d	all year	007
1,2-Dichlorobenzene	daily maximum	≤ 18.22 lb/d	all year	007
1,2-Dichloropropane	daily average	≤ 10 lb/d	all year	007
1,2-Dichloropropane	daily maximum	≤ 21.49 lb/d	all year	007
trans-1,2-Dichloroethylene	daily average	≤ 1.35 lb/d	all year	007
trans-1,2-Dichloroethylene	daily maximum	≤ 3.49 lb/d	all year	007
1,2,4-Trichlorobenzene	daily average	≤ 5.85 lb/d	all year	007
1,2,4-Trichlorobenzene	daily maximum	≤ 17.09 lb/d	all year	007
1,3-Dichlorobenzene	daily average	≤ 3.35 lb/d	all year	007
1,3-Dichlorobenzene	daily maximum	≤ 7.06 lb/d	all year	007
1,4-Dichlorobenzene	daily average	≤ 2.57 lb/d	all year	007
1,4-Dichlorobenzene	daily maximum	≤ 6.28 lb/d	all year	007
2-Chlorophenol	daily average	≤ 1.2 lb/d	all year	007
2-Chlorophenol	daily maximum	≤ 3.8 lb/d	all year	007
2-Nitrophenol	daily average	≤ 2.84 lb/d	all year	007
2-Nitrophenol	daily maximum	≤ 6.35 lb/d	all year	007
2,4-Dichlorophenol	daily average	≤ 1.51 lb/d	all year	007
2,4-Dichlorophenol	daily maximum	≤ 4.35 lb/d	all year	007
2,4-Dimethylphenol	daily average	≤ 1.12 lb/d	all year	007
2,4-Dimethylphenol	daily maximum	≤ 2.36 lb/d	all year	007
2,4-Dinitrotoluene	daily average	≤ 4.38 lb/d	all year	007
2,4-Dinitrotoluene	daily maximum	≤ 11.06 lb/d	all year	007
2,4-Dinitrophenol	daily average	≤ 19.07 lb/d	all year	007
2,4-Dinitrophenol	daily maximum	≤ 61.47 lb/d	all year	007
2,6-Dinitrotoluene	daily average	≤ 9.9 lb/d	all year	007
2,6-Dinitrotoluene	daily maximum	≤ 24.87 lb/d	all year	007
4-Nitrophenol	daily average	≤ 5.61 lb/d	all year	007
4-Nitrophenol	daily maximum	≤ 13.5 lb/d	all year	007
4,6-Dinitro-o-cresol	daily average	≤ 4.81 lb/d	all year	007
4,6-Dinitro-o-cresol	daily maximum	≤ 17.1 lb/d	all year	007
Phenol	daily average	≤ .98 lb/d	all year	007
Phenol	daily maximum	≤ 1.88 lb/d	all year	007
Naphthalene	daily average	≤ 1.29 lb/d	all year	007
Naphthalene	daily maximum	≤ 3.37 lb/d	all year	007
Di[2-ethylhexyl] phthalate [DEHP]	daily average	≤ 6.18 lb/d	all year	007
Di[2-ethylhexyl] phthalate [DEHP]	daily maximum	≤ 16.75 lb/d	all year	007
Di-n-butyl phthalate	daily average	≤ 1.51 lb/d	all year	007
Di-n-butyl phthalate	daily maximum	≤ 3.2 lb/d	all year	007
Vinyl chloride	daily average	≤ 6.26 lb/d	all year	007
Vinyl chloride	daily maximum	≤ 14.35 lb/d	all year	007
Trichloroethylene	daily average	≤ 1.36 lb/d	all year	007
Trichloroethylene	daily maximum	≤ 3.53 lb/d	all year	007
Hexachlorobenzene	daily average	≤ .00019 mg/L	all year	007
Hexachlorobenzene	daily maximum	≤ .00039 mg/L	all year	007
Hexachlorobenzene	daily average	≤ .0159 lb/d	all year	007
Hexachlorobenzene	daily maximum	≤ .0325 lb/d	all year	007
Petrol hydrocarbons, total recoverable	daily average	≤ 15 mg/L	all year	007
Petrol hydrocarbons, total recoverable	daily maximum	≤ 20 mg/L	all year	007
Petrol hydrocarbons, total recoverable	daily average	≤ 1064 lb/d	all year	007
Petrol hydrocarbons, total recoverable	daily maximum	≤ 1419 lb/d	all year	007
Flow, in conduit or thru treatment plant	daily average	≤ 10 MGD	all year	007
Flow, in conduit or thru treatment plant	daily maximum	≤ 12 MGD	all year	007
Chlorine, total residual	daily average	report only (mg/L)	all year	007
Chlorine, total residual	daily maximum	report only (mg/L)	all year	007
Chlorine, total residual	daily average	≤ 18.96 lb/d	all year	007
Chlorine, total residual	daily maximum	≤ 31.2 lb/d	all year	007
1,3-Dichloropropylene	daily average	≤ 3.95 lb/d	all year	007
1,3-Dichloropropylene	daily maximum	≤ 12.41 lb/d	all year	007
3,4-Benzofluoranthene	daily average	≤ 1.35 lb/d	all year	007
3,4-Benzofluoranthene	daily maximum	≤ 3.47 lb/d	all year	007
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 24.9 mg/L	all year	007
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 60 mg/L	all year	007
BOD, carbonaceous [5 day, 20 C]	daily average	≤ 2079 lb/d	all year	007
BOD, carbonaceous [5 day, 20 C]	daily maximum	≤ 5004 lb/d	all year	007
pH range excursions, > 60 minutes	monthly total	≤ 0 occur/mo	all year	007
pH range excursions, monthly total accum	monthly total	≤ 446 min	all year	007
Chloroethane	daily average	≤ 6.5 lb/d	all year	007
Chloroethane	daily maximum	≤ 16.89 lb/d	all year	007
BOD, 5-day, 20 deg. C	daily maximum	≤ 65 mg/L	all year	107
Solids, total suspended	daily maximum	≤ 65 mg/L	all year	107
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	107
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	107
Chlorine, total residual	monthly minimum	≥ 1 mg/L	all year	107
Enterococci	daily average	≤ 35 CFU/100mL	all year	107
Enterococci	daily maximum	≤ 104 CFU/100mL	all year	107
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)	7-day minimum	report only (pass=0;fail=1)	all year	TX7
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)	monthly average minimum	report only (pass=0;fail=1)	all year	TX7
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina	7-day minimum	report only (pass=0;fail=1)	all year	TX7
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllina	monthly average minimum	report only (pass=0;fail=1)	all year	TX7
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7-day minimum	report only (%)	all year	TX7
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	monthly average minimum	report only (%)	all year	TX7
NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina	7-day minimum	report only (%)	all year	TX7
NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllina	monthly average minimum	report only (%)	all year	TX7
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7-day minimum	report only (%)	all year	TX7
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	monthly average minimum	report only (%)	all year	TX7
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina	7-day minimum	report only (%)	all year	TX7
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina	monthly average minimum	report only (%)	all year	TX7
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7-day minimum	report only (pass=0;fail=1)	all year	TX7
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	monthly average minimum	report only (pass=0;fail=1)	all year	TX7
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina	7-day minimum	report only (pass=0;fail=1)	all year	TX7
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllina	monthly average minimum	report only (pass=0;fail=1)	all year	TX7
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7-day minimum	report only (%)	all year	TX7
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	monthly average minimum	report only (%)	all year	TX7
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina	7-day minimum	report only (%)	all year	TX7
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllina	monthly average minimum	report only (%)	all year	TX7
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)	7-day minimum	report only (%)	all year	TX7
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)	monthly average minimum	report only (%)	all year	TX7
LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina	7-day minimum	report only (%)	all year	TX7
LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllina	monthly average minimum	report only (%)	all year	TX7
LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)	single sample	report only (pass=0;fail=1)	all year	TXG
LC50 Pass/Fail Static 24Hr Acute Menidia beryllina	single sample	report only (pass=0;fail=1)	all year	TXG

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/TX0002798 · MCP: https://passage-data.com/mcp