Syngenta Crop Protection LLC — NPDES permit TX0007439: limits, due date and EPA's record

Agricultural Chemicals, major discharger, Houston, Texas. NPDES permit TX0007439 expired Mar 27, 2024; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Limits in force (267)

Parameter	Statistic	Limit	Months	Outfall
pH	minimum	≥ 6 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Oil & Grease	daily maximum	≤ 15 mg/L	all year	001
Cyanide, free [amenable to chlorination]	daily average	≤ .009 mg/L	all year	001
Cyanide, free [amenable to chlorination]	daily maximum	≤ .019 mg/L	all year	001
Arsenic, total [as As]	daily average	≤ .1 mg/L	all year	001
Arsenic, total [as As]	daily maximum	≤ .2 mg/L	all year	001
Cadmium, total [as Cd]	daily average	report only (mg/L)	all year	001
Cadmium, total [as Cd]	daily maximum	report only (mg/L)	all year	001
Chromium, hexavalent [as Cr]	daily average	report only (mg/L)	all year	001
Chromium, hexavalent [as Cr]	daily maximum	report only (mg/L)	all year	001
Copper, total [as Cu]	daily average	≤ .024 mg/L	all year	001
Copper, total [as Cu]	daily maximum	≤ .051 mg/L	all year	001
Copper, total [as Cu]	daily average	≤ .165 lb/d	all year	001
Copper, total [as Cu]	daily maximum	≤ .35 lb/d	all year	001
Lead, total [as Pb]	daily average	≤ .155 mg/L	all year	001
Lead, total [as Pb]	daily maximum	≤ .329 mg/L	all year	001
Lead, total [as Pb]	daily average	≤ 1.07 lb/d	all year	001
Lead, total [as Pb]	daily maximum	≤ 2.27 lb/d	all year	001
Manganese, total [as Mn]	daily average	≤ 1 mg/L	all year	001
Manganese, total [as Mn]	daily maximum	≤ 3 mg/L	all year	001
Silver, total [as Ag]	daily average	report only (mg/L)	all year	001
Silver, total [as Ag]	daily maximum	report only (mg/L)	all year	001
Vanadium, total [as V]	daily average	report only (mg/L)	all year	001
Vanadium, total [as V]	daily maximum	report only (mg/L)	all year	001
Selenium, total [as Se]	daily average	report only (mg/L)	all year	001
Selenium, total [as Se]	daily maximum	report only (mg/L)	all year	001
.delta.-Benzenehexachloride	daily average	report only (mg/L)	all year	001
.delta.-Benzenehexachloride	daily maximum	report only (mg/L)	all year	001
4,4'-DDT	daily average	report only (mg/L)	all year	001
4,4'-DDT	daily maximum	report only (mg/L)	all year	001
4,4'-DDD	daily average	report only (mg/L)	all year	001
4,4'-DDD	daily maximum	report only (mg/L)	all year	001
4,4'-DDE	daily average	report only (mg/L)	all year	001
4,4'-DDE	daily maximum	report only (mg/L)	all year	001
Aldrin	daily average	report only (mg/L)	all year	001
Aldrin	daily maximum	report only (mg/L)	all year	001
.alpha.-BHC	daily average	report only (mg/L)	all year	001
.alpha.-BHC	daily maximum	report only (mg/L)	all year	001
.beta.-BHC	daily average	report only (mg/L)	all year	001
.beta.-BHC	daily maximum	report only (mg/L)	all year	001
.gamma.-BHC	daily average	report only (mg/L)	all year	001
.gamma.-BHC	daily maximum	report only (mg/L)	all year	001
Chlordane [tech mix. and metabolites]	daily average	report only (mg/L)	all year	001
Chlordane [tech mix. and metabolites]	daily maximum	report only (mg/L)	all year	001
Dieldrin	daily average	report only (mg/L)	all year	001
Dieldrin	daily maximum	report only (mg/L)	all year	001
Hexachlorobenzene	daily average	≤ .00015 mg/L	all year	001
Hexachlorobenzene	daily maximum	≤ .00033 mg/L	all year	001
Hexachlorobenzene	daily average	≤ .0005 lb/d	all year	001
Hexachlorobenzene	daily maximum	≤ .0012 lb/d	all year	001
Dacthal	daily maximum	≤ .168 mg/L	all year	001
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Mercury, total [as Hg]	daily average	report only (mg/L)	all year	001
Mercury, total [as Hg]	daily maximum	report only (mg/L)	all year	001
Xylene [mix of m+o+p]	daily average	report only (mg/L)	all year	001
Xylene [mix of m+o+p]	daily maximum	report only (mg/L)	all year	001
TCDD equivalents	daily maximum	report only (pg/L)	all year	001
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	≤ 55 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	≤ 55 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	≤ 55 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	005
pH	maximum	≤ 9 SU	all year	005
Oil & Grease	daily maximum	≤ 15 mg/L	all year	005
Carbon, tot organic [TOC]	daily maximum	≤ 55 mg/L	all year	005
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	005
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	005
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	≤ 55 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
BOD, 5-day, 20 deg. C	daily average	≤ 180 lb/d	all year	101
BOD, 5-day, 20 deg. C	daily maximum	≤ 500 lb/d	all year	101
Oxygen demand, chem. [high level] [COD]	daily average	≤ 1167 lb/d	all year	101
Oxygen demand, chem. [high level] [COD]	daily maximum	≤ 1885 lb/d	all year	101
Solids, total suspended	daily average	≤ 215 lb/d	all year	101
Solids, total suspended	daily maximum	≤ 500 lb/d	all year	101
Nitrogen, ammonia total [as N]	daily average	≤ 20 lb/d	all year	101
Nitrogen, ammonia total [as N]	daily maximum	≤ 40 lb/d	all year	101
Carbon, tot organic [TOC]	daily average	≤ 640 lb/d	all year	101
Carbon, tot organic [TOC]	daily maximum	≤ 1280 lb/d	all year	101
Cyanide, total [as CN]	daily average	≤ .973 lb/d	all year	101
Cyanide, total [as CN]	daily maximum	≤ 2.83 lb/d	all year	101
Arsenic, total [as As]	daily average	≤ 1.5 lb/d	all year	101
Arsenic, total [as As]	daily maximum	≤ 2.25 lb/d	all year	101
Carbon tetrachloride	daily average	≤ .086 lb/d	all year	101
Carbon tetrachloride	daily maximum	≤ .18 lb/d	all year	101
1,2-Dichloroethane	daily average	≤ .323 lb/d	all year	101
1,2-Dichloroethane	daily maximum	≤ 1.003 lb/d	all year	101
Bromoform	daily average	≤ .822 lb/d	all year	101
Bromoform	daily maximum	≤ 3.332 lb/d	all year	101
Dibromochloromethane	daily average	≤ .595 lb/d	all year	101
Dibromochloromethane	daily maximum	≤ 1.594 lb/d	all year	101
Chloroform	daily average	≤ .1 lb/d	all year	101
Chloroform	daily maximum	≤ .219 lb/d	all year	101
Toluene	daily average	≤ .124 lb/d	all year	101
Toluene	daily maximum	≤ .38 lb/d	all year	101
Benzene	daily average	≤ .176 lb/d	all year	101
Benzene	daily maximum	≤ .647 lb/d	all year	101
Acenaphthylene	daily average	≤ .012 lb/d	all year	101
Acenaphthylene	daily maximum	≤ .033 lb/d	all year	101
Acenaphthene	daily average	≤ .012 lb/d	all year	101
Acenaphthene	daily maximum	≤ .033 lb/d	all year	101
Acrylonitrile	daily average	≤ .054 lb/d	all year	101
Acrylonitrile	daily maximum	≤ .135 lb/d	all year	101
Anthracene	daily average	≤ .012 lb/d	all year	101
Anthracene	daily maximum	≤ .033 lb/d	all year	101
Benzo[b]fluoranthene	daily average	≤ .013 lb/d	all year	101
Benzo[b]fluoranthene	daily maximum	≤ .034 lb/d	all year	101
Benzo[k]fluoranthene	daily average	≤ .012 lb/d	all year	101
Benzo[k]fluoranthene	daily maximum	≤ .033 lb/d	all year	101
Benzo[a]pyrene	daily average	≤ .013 lb/d	all year	101
Benzo[a]pyrene	daily maximum	≤ .034 lb/d	all year	101
Chlorobenzene	daily average	≤ .071 lb/d	all year	101
Chlorobenzene	daily maximum	≤ .133 lb/d	all year	101
Chrysene	daily average	≤ .012 lb/d	all year	101
Chrysene	daily maximum	≤ .033 lb/d	all year	101
Diethyl phthalate	daily average	≤ .045 lb/d	all year	101
Diethyl phthalate	daily maximum	≤ .114 lb/d	all year	101
Dimethyl phthalate	daily average	≤ .011 lb/d	all year	101
Dimethyl phthalate	daily maximum	≤ .026 lb/d	all year	101
Ethylbenzene	daily average	≤ .152 lb/d	all year	101
Ethylbenzene	daily maximum	≤ .514 lb/d	all year	101
Fluoranthene	daily average	≤ .014 lb/d	all year	101
Fluoranthene	daily maximum	≤ .038 lb/d	all year	101
Fluorene	daily average	≤ .012 lb/d	all year	101
Fluorene	daily maximum	≤ .033 lb/d	all year	101
Hexachlorobutadiene	daily average	≤ .011 lb/d	all year	101
Hexachlorobutadiene	daily maximum	≤ .027 lb/d	all year	101
Hexachloroethane	daily average	≤ .012 lb/d	all year	101
Hexachloroethane	daily maximum	≤ .03 lb/d	all year	101
Methylene chloride	daily average	≤ .19 lb/d	all year	101
Methylene chloride	daily maximum	≤ .423 lb/d	all year	101
Nitrobenzene	daily average	≤ .015 lb/d	all year	101
Nitrobenzene	daily maximum	≤ .038 lb/d	all year	101
Phenanthrene	daily average	≤ .012 lb/d	all year	101
Phenanthrene	daily maximum	≤ .033 lb/d	all year	101
Pyrene	daily average	≤ .014 lb/d	all year	101
Pyrene	daily maximum	≤ .037 lb/d	all year	101
Tetrachloroethylene	daily average	≤ .105 lb/d	all year	101
Tetrachloroethylene	daily maximum	≤ .266 lb/d	all year	101
1,1-Dichloroethane	daily average	≤ .012 lb/d	all year	101
1,1-Dichloroethane	daily maximum	≤ .033 lb/d	all year	101
1,1-Dichloroethylene	daily average	≤ .076 lb/d	all year	101
1,1-Dichloroethylene	daily maximum	≤ .119 lb/d	all year	101
1,1,1-Trichloroethane	daily average	≤ .1 lb/d	all year	101
1,1,1-Trichloroethane	daily maximum	≤ .257 lb/d	all year	101
1,1,2-Trichloroethane	daily average	≤ .012 lb/d	all year	101
1,1,2-Trichloroethane	daily maximum	≤ .03 lb/d	all year	101
Benzo[a]anthracene	daily average	≤ .012 lb/d	all year	101
Benzo[a]anthracene	daily maximum	≤ .033 lb/d	all year	101
1,2-Dichlorobenzene	daily average	≤ .366 lb/d	all year	101
1,2-Dichlorobenzene	daily maximum	≤ .775 lb/d	all year	101
1,2-Dichloropropane	daily average	≤ .728 lb/d	all year	101
1,2-Dichloropropane	daily maximum	≤ 1.094 lb/d	all year	101
trans-1,2-Dichloroethylene	daily average	≤ .1 lb/d	all year	101
trans-1,2-Dichloroethylene	daily maximum	≤ .257 lb/d	all year	101
1,2,4-Trichlorobenzene	daily average	≤ .038 lb/d	all year	101
1,2,4-Trichlorobenzene	daily maximum	≤ .078 lb/d	all year	101
1,3-Dichlorobenzene	daily average	≤ .017 lb/d	all year	101
1,3-Dichlorobenzene	daily maximum	≤ .025 lb/d	all year	101
1,4-Dichlorobenzene	daily average	≤ .071 lb/d	all year	101
1,4-Dichlorobenzene	daily maximum	≤ .133 lb/d	all year	101
2-Chlorophenol	daily average	≤ .147 lb/d	all year	101
2-Chlorophenol	daily maximum	≤ .466 lb/d	all year	101
2-Nitrophenol	daily average	≤ .023 lb/d	all year	101
2-Nitrophenol	daily maximum	≤ .039 lb/d	all year	101
2,4-Dichlorophenol	daily average	≤ .185 lb/d	all year	101
2,4-Dichlorophenol	daily maximum	≤ .533 lb/d	all year	101
2,4-Dimethylphenol	daily average	≤ .086 lb/d	all year	101
2,4-Dimethylphenol	daily maximum	≤ .171 lb/d	all year	101
2,4-Dinitrotoluene	daily average	≤ .063 lb/d	all year	101
2,4-Dinitrotoluene	daily maximum	≤ .159 lb/d	all year	101
2,4-Dinitrophenol	daily average	≤ .04 lb/d	all year	101
2,4-Dinitrophenol	daily maximum	≤ .069 lb/d	all year	101
2,6-Dinitrotoluene	daily average	≤ .143 lb/d	all year	101
2,6-Dinitrotoluene	daily maximum	≤ .358 lb/d	all year	101
4-Nitrophenol	daily average	≤ .04 lb/d	all year	101
4-Nitrophenol	daily maximum	≤ .069 lb/d	all year	101
4,6-Dinitro-o-cresol	daily average	≤ .044 lb/d	all year	101
4,6-Dinitro-o-cresol	daily maximum	≤ .155 lb/d	all year	101
Phenol	daily average	≤ .071 lb/d	all year	101
Phenol	daily maximum	≤ .124 lb/d	all year	101
Naphthalene	daily average	≤ .105 lb/d	all year	101
Naphthalene	daily maximum	≤ .281 lb/d	all year	101
Bromomethane	daily average	≤ .595 lb/d	all year	101
Bromomethane	daily maximum	≤ 1.594 lb/d	all year	101
Chloromethane	daily average	≤ .166 lb/d	all year	101
Chloromethane	daily maximum	≤ .366 lb/d	all year	101
Bromodichloromethane, effluent	daily average	≤ .614 lb/d	all year	101
Bromodichloromethane, effluent	daily maximum	≤ 1.643 lb/d	all year	101
Di[2-ethylhexyl] phthalate [DEHP]	daily average	≤ .058 lb/d	all year	101
Di[2-ethylhexyl] phthalate [DEHP]	daily maximum	≤ .156 lb/d	all year	101
Di-n-butyl phthalate	daily average	≤ .015 lb/d	all year	101
Di-n-butyl phthalate	daily maximum	≤ .032 lb/d	all year	101
Vinyl chloride	daily average	≤ .058 lb/d	all year	101
Vinyl chloride	daily maximum	≤ .15 lb/d	all year	101
Trichloroethylene	daily average	≤ .012 lb/d	all year	101
Trichloroethylene	daily maximum	≤ .03 lb/d	all year	101
Flow, in conduit or thru treatment plant	daily average	≤ .9 MGD	all year	101
Flow, in conduit or thru treatment plant	daily maximum	≤ 1.6 MGD	all year	101
Chlorine, total residual	monthly minimum	≥ 1 mg/L	all year	101
Chlorine, total residual	monthly maximum	≤ 4 mg/L	all year	101
Enterococci	daily average	≤ 35 CFU/100mL	all year	101
Enterococci	daily maximum	≤ 104 CFU/100mL	all year	101
Daconil [C8Cl4N2]	daily average	≤ .053 lb/d	all year	101
Daconil [C8Cl4N2]	daily maximum	≤ .176 lb/d	all year	101
1,3-Dichloropropene	daily average	≤ .138 lb/d	all year	101
1,3-Dichloropropene	daily maximum	≤ .21 lb/d	all year	101
Chloroethane	daily average	≤ .058 lb/d	all year	101
Chloroethane	daily maximum	≤ .15 lb/d	all year	101
Carbon, tot organic [TOC]	daily maximum	≤ 55 mg/L	all year	201
Arsenic, total [as As]	daily maximum	≤ .6 mg/L	all year	201
Flow, in conduit or thru treatment plant	daily average	report only (MGD)	all year	201
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	201
Daconil [C8Cl4N2]	daily maximum	≤ .6 mg/L	all year	201
Whole Effluent Toxicity [WET] - M. beryllina	7-day minimum	≥ 8 %	all year	TX1
Whole Effluent Toxicity [WET] - M. beryllina	monthly average minimum	≥ 8 %	all year	TX1
Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)	7-day minimum	> 8 %	all year	TX1
Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)	monthly average minimum	> 8 %	all year	TX1
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	TX1
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	TX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia	7-day minimum	report only (pass=0;fail=1)	all year	TX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia	monthly average minimum	report only (pass=0;fail=1)	all year	TX1
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7-day minimum	report only (%)	all year	TX1
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	monthly average minimum	report only (%)	all year	TX1
NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia	7-day minimum	report only (%)	all year	TX1
NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia	monthly average minimum	report only (%)	all year	TX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7-day minimum	report only (%)	all year	TX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	monthly average minimum	report only (%)	all year	TX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia	7-day minimum	report only (%)	all year	TX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia	monthly average minimum	report only (%)	all year	TX1
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	TX1
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	TX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia	7-day minimum	report only (pass=0;fail=1)	all year	TX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia	monthly average minimum	report only (pass=0;fail=1)	all year	TX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	7-day minimum	report only (%)	all year	TX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)	monthly average minimum	report only (%)	all year	TX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia	7-day minimum	report only (%)	all year	TX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia	monthly average minimum	report only (%)	all year	TX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)	7-day minimum	report only (%)	all year	TX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)	monthly average minimum	report only (%)	all year	TX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia	7-day minimum	report only (%)	all year	TX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia	monthly average minimum	report only (%)	all year	TX1
Whole effluent toxicity - retest #1	single sample	report only (pass=0;fail=1)	all year	TXA
Whole effluent toxicity - retest #2	single sample	report only (pass=0;fail=1)	all year	TXA
Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)	single sample	≤ 100 %	all year	TXA
LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)	single sample	report only (pass=0;fail=1)	all year	TXA
LC50 Pass/Fail Static 24Hr Acute Menidia menidia	single sample	report only (pass=0;fail=1)	all year	TXA

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/TX0007439 · MCP: https://passage-data.com/mcp