Eco Services Operations Corp — NPDES permit TX0007072: limits, due date and EPA's record

Industrial Inorganic Chemicals, major discharger, Houston, Texas. NPDES permit TX0007072, in force until Oct 25, 2029. Last 12 months: no values over a limit, 3 of 44 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (289)

Parameter	Statistic	Limit	Months	Outfall
Temperature, water deg. fahrenheit	daily average	≤ 100 deg F	all year	001
Temperature, water deg. fahrenheit	daily maximum	≤ 105 deg F	all year	001
BOD, 5-day, 20 deg. C	daily average	≤ 60 lb/d	all year	001
BOD, 5-day, 20 deg. C	daily maximum	≤ 150 lb/d	all year	001
Oxygen demand, chem. [high level] [COD]	daily average	≤ 425 lb/d	all year	001
Oxygen demand, chem. [high level] [COD]	daily maximum	≤ 1064 lb/d	all year	001
pH	minimum	≥ 5 SU	all year	001
pH	maximum	≤ 11 SU	all year	001
Solids, total suspended	daily average	≤ 132 lb/d	all year	001
Solids, total suspended	daily maximum	≤ 332 lb/d	all year	001
Carbon tetrachloride	daily average	report only (lb/d)	all year	001
Carbon tetrachloride	daily maximum	report only (lb/d)	all year	001
1,2-Dichloroethane	daily average	report only (lb/d)	all year	001
1,2-Dichloroethane	daily maximum	report only (lb/d)	all year	001
Chloroform	daily average	report only (lb/d)	all year	001
Chloroform	daily maximum	report only (lb/d)	all year	001
Toluene	daily average	report only (lb/d)	all year	001
Toluene	daily maximum	report only (lb/d)	all year	001
Benzene	daily average	report only (lb/d)	all year	001
Benzene	daily maximum	report only (lb/d)	all year	001
Chlorobenzene	daily average	report only (lb/d)	all year	001
Chlorobenzene	daily maximum	report only (lb/d)	all year	001
Ethylbenzene	daily average	report only (lb/d)	all year	001
Ethylbenzene	daily maximum	report only (lb/d)	all year	001
Hexachlorobutadiene	daily average	report only (lb/d)	all year	001
Hexachlorobutadiene	daily maximum	report only (lb/d)	all year	001
Hexachloroethane	daily average	report only (lb/d)	all year	001
Hexachloroethane	daily maximum	report only (lb/d)	all year	001
Methyl chloride [Chloromethane]	daily average	report only (lb/d)	all year	001
Methyl chloride [Chloromethane]	daily maximum	report only (lb/d)	all year	001
Methylene chloride	daily average	report only (lb/d)	all year	001
Methylene chloride	daily maximum	report only (lb/d)	all year	001
Nitrobenzene	daily average	report only (lb/d)	all year	001
Nitrobenzene	daily maximum	report only (lb/d)	all year	001
Tetrachloroethylene	daily average	report only (lb/d)	all year	001
Tetrachloroethylene	daily maximum	report only (lb/d)	all year	001
1,1-Dichloroethane	daily average	report only (lb/d)	all year	001
1,1-Dichloroethane	daily maximum	report only (lb/d)	all year	001
1,1-Dichloroethylene	daily average	report only (lb/d)	all year	001
1,1-Dichloroethylene	daily maximum	report only (lb/d)	all year	001
1,1,1-Trichloroethane	daily average	report only (lb/d)	all year	001
1,1,1-Trichloroethane	daily maximum	report only (lb/d)	all year	001
1,1,2-Trichloroethane	daily average	report only (lb/d)	all year	001
1,1,2-Trichloroethane	daily maximum	report only (lb/d)	all year	001
1,2-Dichlorobenzene	daily average	report only (lb/d)	all year	001
1,2-Dichlorobenzene	daily maximum	report only (lb/d)	all year	001
1,2-Dichloropropane	daily average	report only (lb/d)	all year	001
1,2-Dichloropropane	daily maximum	report only (lb/d)	all year	001
trans-1,2-Dichloroethylene	daily average	report only (lb/d)	all year	001
trans-1,2-Dichloroethylene	daily maximum	report only (lb/d)	all year	001
1,2,4-Trichlorobenzene	daily average	report only (lb/d)	all year	001
1,2,4-Trichlorobenzene	daily maximum	report only (lb/d)	all year	001
1,3-Dichlorobenzene	daily average	report only (lb/d)	all year	001
1,3-Dichlorobenzene	daily maximum	report only (lb/d)	all year	001
1,4-Dichlorobenzene	daily average	report only (lb/d)	all year	001
1,4-Dichlorobenzene	daily maximum	report only (lb/d)	all year	001
2-Nitrophenol	daily average	report only (lb/d)	all year	001
2-Nitrophenol	daily maximum	report only (lb/d)	all year	001
2,4-Dinitrophenol	daily average	report only (lb/d)	all year	001
2,4-Dinitrophenol	daily maximum	report only (lb/d)	all year	001
4-Nitrophenol	daily average	report only (lb/d)	all year	001
4-Nitrophenol	daily maximum	report only (lb/d)	all year	001
4,6-Dinitro-o-cresol	daily average	report only (lb/d)	all year	001
4,6-Dinitro-o-cresol	daily maximum	report only (lb/d)	all year	001
Vinyl chloride	daily average	report only (lb/d)	all year	001
Vinyl chloride	daily maximum	report only (lb/d)	all year	001
Trichloroethylene	daily average	report only (lb/d)	all year	001
Trichloroethylene	daily maximum	report only (lb/d)	all year	001
Flow, in conduit or thru treatment plant	daily average	≤ 1.44 MGD	all year	001
Flow, in conduit or thru treatment plant	daily maximum	≤ 3 MGD	all year	001
1,3-Dichloropropylene	daily average	report only (lb/d)	all year	001
1,3-Dichloropropylene	daily maximum	report only (lb/d)	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	daily average	report only (lb/d)	all year	001
Chloroethane	daily maximum	report only (lb/d)	all year	001
Temperature, water deg. fahrenheit	daily average	≤ 100 deg F	all year	002
Temperature, water deg. fahrenheit	daily maximum	≤ 105 deg F	all year	002
BOD, 5-day, 20 deg. C	daily maximum	≤ 15 mg/L	all year	002
BOD, 5-day, 20 deg. C	daily average	≤ 60 lb/d	all year	002
BOD, 5-day, 20 deg. C	daily maximum	≤ 150 lb/d	all year	002
Oxygen demand, chem. [high level] [COD]	daily maximum	≤ 200 mg/L	all year	002
Oxygen demand, chem. [high level] [COD]	daily average	report only (lb/d)	all year	002
Oxygen demand, chem. [high level] [COD]	daily maximum	report only (lb/d)	all year	002
pH	minimum	≥ 5 SU	all year	002
pH	maximum	≤ 11 SU	all year	002
Solids, total suspended	daily maximum	≤ 100 mg/L	all year	002
Solids, total suspended	daily average	report only (lb/d)	all year	002
Solids, total suspended	daily maximum	report only (lb/d)	all year	002
Zinc, total [as Zn]	daily average	report only (mg/L)	all year	002
Zinc, total [as Zn]	daily maximum	report only (mg/L)	all year	002
Carbon tetrachloride	daily average	report only (lb/d)	all year	002
Carbon tetrachloride	daily maximum	report only (lb/d)	all year	002
1,2-Dichloroethane	daily average	report only (lb/d)	all year	002
1,2-Dichloroethane	daily maximum	report only (lb/d)	all year	002
Chloroform	daily average	report only (lb/d)	all year	002
Chloroform	daily maximum	report only (lb/d)	all year	002
Toluene	daily average	report only (lb/d)	all year	002
Toluene	daily maximum	report only (lb/d)	all year	002
Benzene	daily average	report only (lb/d)	all year	002
Benzene	daily maximum	report only (lb/d)	all year	002
Chlorobenzene	daily average	report only (lb/d)	all year	002
Chlorobenzene	daily maximum	report only (lb/d)	all year	002
Ethylbenzene	daily average	report only (lb/d)	all year	002
Ethylbenzene	daily maximum	report only (lb/d)	all year	002
Hexachlorobutadiene	daily average	report only (lb/d)	all year	002
Hexachlorobutadiene	daily maximum	report only (lb/d)	all year	002
Hexachloroethane	daily average	report only (lb/d)	all year	002
Hexachloroethane	daily maximum	report only (lb/d)	all year	002
Methyl chloride [Chloromethane]	daily average	report only (lb/d)	all year	002
Methyl chloride [Chloromethane]	daily maximum	report only (lb/d)	all year	002
Methylene chloride	daily average	report only (lb/d)	all year	002
Methylene chloride	daily maximum	report only (lb/d)	all year	002
Nitrobenzene	daily average	report only (lb/d)	all year	002
Nitrobenzene	daily maximum	report only (lb/d)	all year	002
Tetrachloroethylene	daily average	report only (lb/d)	all year	002
Tetrachloroethylene	daily maximum	report only (lb/d)	all year	002
1,1-Dichloroethane	daily average	report only (lb/d)	all year	002
1,1-Dichloroethane	daily maximum	report only (lb/d)	all year	002
1,1-Dichloroethylene	daily average	report only (lb/d)	all year	002
1,1-Dichloroethylene	daily maximum	report only (lb/d)	all year	002
1,1,1-Trichloroethane	daily average	report only (lb/d)	all year	002
1,1,1-Trichloroethane	daily maximum	report only (lb/d)	all year	002
1,1,2-Trichloroethane	daily average	report only (lb/d)	all year	002
1,1,2-Trichloroethane	daily maximum	report only (lb/d)	all year	002
1,2-Dichlorobenzene	daily average	report only (lb/d)	all year	002
1,2-Dichlorobenzene	daily maximum	report only (lb/d)	all year	002
1,2-Dichloropropane	daily average	report only (lb/d)	all year	002
1,2-Dichloropropane	daily maximum	report only (lb/d)	all year	002
trans-1,2-Dichloroethylene	daily average	report only (lb/d)	all year	002
trans-1,2-Dichloroethylene	daily maximum	report only (lb/d)	all year	002
1,2,4-Trichlorobenzene	daily average	report only (lb/d)	all year	002
1,2,4-Trichlorobenzene	daily maximum	report only (lb/d)	all year	002
1,3-Dichlorobenzene	daily average	report only (lb/d)	all year	002
1,3-Dichlorobenzene	daily maximum	report only (lb/d)	all year	002
1,4-Dichlorobenzene	daily average	report only (lb/d)	all year	002
1,4-Dichlorobenzene	daily maximum	report only (lb/d)	all year	002
2-Nitrophenol	daily average	report only (lb/d)	all year	002
2-Nitrophenol	daily maximum	report only (lb/d)	all year	002
2,4-Dinitrophenol	daily average	report only (lb/d)	all year	002
2,4-Dinitrophenol	daily maximum	report only (lb/d)	all year	002
4-Nitrophenol	daily average	report only (lb/d)	all year	002
4-Nitrophenol	daily maximum	report only (lb/d)	all year	002
4,6-Dinitro-o-cresol	daily average	report only (lb/d)	all year	002
4,6-Dinitro-o-cresol	daily maximum	report only (lb/d)	all year	002
Vinyl chloride	daily average	report only (lb/d)	all year	002
Vinyl chloride	daily maximum	report only (lb/d)	all year	002
Trichloroethylene	daily average	report only (lb/d)	all year	002
Trichloroethylene	daily maximum	report only (lb/d)	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
1,3-Dichloropropylene	daily average	report only (lb/d)	all year	002
1,3-Dichloropropylene	daily maximum	report only (lb/d)	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
Chloroethane	daily average	report only (lb/d)	all year	002
Chloroethane	daily maximum	report only (lb/d)	all year	002
Oxygen demand, chem. [high level] [COD]	daily average	≤ 425 lb/d	all year	003
Oxygen demand, chem. [high level] [COD]	daily maximum	≤ 1064 lb/d	all year	003
Solids, total suspended	daily average	≤ 132 lb/d	all year	003
Solids, total suspended	daily maximum	≤ 332 lb/d	all year	003
Carbon tetrachloride	daily average	≤ .41 lb/d	all year	003
Carbon tetrachloride	daily maximum	≤ 1.1 lb/d	all year	003
1,2-Dichloroethane	daily average	≤ .52 lb/d	all year	003
1,2-Dichloroethane	daily maximum	≤ 1.66 lb/d	all year	003
Chloroform	daily average	≤ .32 lb/d	all year	003
Chloroform	daily maximum	≤ .94 lb/d	all year	003
Toluene	daily average	≤ .08 lb/d	all year	003
Toluene	daily maximum	≤ .21 lb/d	all year	003
Benzene	daily average	≤ .16 lb/d	all year	003
Benzene	daily maximum	≤ .39 lb/d	all year	003
Chlorobenzene	daily average	≤ .41 lb/d	all year	003
Chlorobenzene	daily maximum	≤ 1.1 lb/d	all year	003
Ethylbenzene	daily average	≤ .41 lb/d	all year	003
Ethylbenzene	daily maximum	≤ 1.1 lb/d	all year	003
Hexachlorobutadiene	daily average	≤ .41 lb/d	all year	003
Hexachlorobutadiene	daily maximum	≤ 1.04 lb/d	all year	003
Hexachloroethane	daily average	≤ .57 lb/d	all year	003
Hexachloroethane	daily maximum	≤ 2.3 lb/d	all year	003
Methyl chloride [Chloromethane]	daily average	≤ .32 lb/d	all year	003
Methyl chloride [Chloromethane]	daily maximum	≤ .85 lb/d	all year	003
Methylene chloride	daily average	≤ .1 lb/d	all year	003
Methylene chloride	daily maximum	≤ .49 lb/d	all year	003
Nitrobenzene	daily average	≤ 6.47 lb/d	all year	003
Nitrobenzene	daily maximum	≤ 18.5 lb/d	all year	003
Tetrachloroethylene	daily average	≤ .15 lb/d	all year	003
Tetrachloroethylene	daily maximum	≤ .47 lb/d	all year	003
1,1-Dichloroethane	daily average	≤ .06 lb/d	all year	003
1,1-Dichloroethane	daily maximum	≤ .17 lb/d	all year	003
1,1-Dichloroethylene	daily average	≤ .06 lb/d	all year	003
1,1-Dichloroethylene	daily maximum	≤ .17 lb/d	all year	003
1,1,1-Trichloroethane	daily average	≤ .06 lb/d	all year	003
1,1,1-Trichloroethane	daily maximum	≤ .17 lb/d	all year	003
1,1,2-Trichloroethane	daily average	≤ .09 lb/d	all year	003
1,1,2-Trichloroethane	daily maximum	≤ .37 lb/d	all year	003
1,2-Dichlorobenzene	daily average	≤ .57 lb/d	all year	003
1,2-Dichlorobenzene	daily maximum	≤ 2.3 lb/d	all year	003
1,2-Dichloropropane	daily average	≤ .57 lb/d	all year	003
1,2-Dichloropropane	daily maximum	≤ 2.3 lb/d	all year	003
trans-1,2-Dichloroethylene	daily average	≤ .07 lb/d	all year	003
trans-1,2-Dichloroethylene	daily maximum	≤ .19 lb/d	all year	003
1,2,4-Trichlorobenzene	daily average	≤ .57 lb/d	all year	003
1,2,4-Trichlorobenzene	daily maximum	≤ 2.3 lb/d	all year	003
1,3-Dichlorobenzene	daily average	≤ .41 lb/d	all year	003
1,3-Dichlorobenzene	daily maximum	≤ 1.1 lb/d	all year	003
1,4-Dichlorobenzene	daily average	≤ .41 lb/d	all year	003
1,4-Dichlorobenzene	daily maximum	≤ 1.1 lb/d	all year	003
2-Nitrophenol	daily average	≤ .19 lb/d	all year	003
2-Nitrophenol	daily maximum	≤ .67 lb/d	all year	003
2,4-Dinitrophenol	daily average	≤ 3.49 lb/d	all year	003
2,4-Dinitrophenol	daily maximum	≤ 12.4 lb/d	all year	003
4-Nitrophenol	daily average	≤ .47 lb/d	all year	003
4-Nitrophenol	daily maximum	≤ 1.67 lb/d	all year	003
4,6-Dinitro-o-cresol	daily average	≤ .23 lb/d	all year	003
4,6-Dinitro-o-cresol	daily maximum	≤ .8 lb/d	all year	003
Vinyl chloride	daily average	≤ .28 lb/d	all year	003
Vinyl chloride	daily maximum	≤ .5 lb/d	all year	003
Trichloroethylene	daily average	≤ .08 lb/d	all year	003
Trichloroethylene	daily maximum	≤ .2 lb/d	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
1,3-Dichloropropylene	daily average	≤ .57 lb/d	all year	003
1,3-Dichloropropylene	daily maximum	≤ 2.3 lb/d	all year	003
Chloroethane	daily average	≤ .32 lb/d	all year	003
Chloroethane	daily maximum	≤ .85 lb/d	all year	003
Solids, total suspended	daily average	≤ 77 lb/d	all year	101
Solids, total suspended	daily maximum	≤ 169 lb/d	all year	101
Carbon, tot organic [TOC]	daily average	≤ 12 mg/L	all year	101
Carbon, tot organic [TOC]	daily maximum	≤ 19 mg/L	all year	101
Carbon, tot organic [TOC]	daily average	report only (lb/d)	all year	101
Carbon, tot organic [TOC]	daily maximum	report only (lb/d)	all year	101
Arsenic, total [as As]	daily average	≤ .096 mg/L	all year	101
Arsenic, total [as As]	daily maximum	≤ .179 mg/L	all year	101
Arsenic, total [as As]	daily average	≤ .24 lb/d	all year	101
Arsenic, total [as As]	daily maximum	≤ .33 lb/d	all year	101
Cadmium, total [as Cd]	daily average	report only (mg/L)	all year	101
Cadmium, total [as Cd]	daily maximum	≤ .179 mg/L	all year	101
Cadmium, total [as Cd]	daily average	≤ .22 lb/d	all year	101
Cadmium, total [as Cd]	daily maximum	≤ .45 lb/d	all year	101
Chromium, total [as Cr]	daily average	≤ .419 mg/L	all year	101
Chromium, total [as Cr]	daily maximum	≤ .834 mg/L	all year	101
Chromium, total [as Cr]	daily average	≤ .6 lb/d	all year	101
Chromium, total [as Cr]	daily maximum	≤ .82 lb/d	all year	101
Copper, total [as Cu]	daily average	≤ .419 mg/L	all year	101
Copper, total [as Cu]	daily maximum	≤ .834 mg/L	all year	101
Copper, total [as Cu]	daily average	≤ 1.05 lb/d	all year	101
Copper, total [as Cu]	daily maximum	≤ 1.99 lb/d	all year	101
Lead, total [as Pb]	daily average	≤ .419 mg/L	all year	101
Lead, total [as Pb]	daily maximum	≤ .838 mg/L	all year	101
Lead, total [as Pb]	daily average	≤ .48 lb/d	all year	101
Lead, total [as Pb]	daily maximum	≤ .66 lb/d	all year	101
Silver, total [as Ag]	daily average	report only (mg/L)	all year	101
Silver, total [as Ag]	daily maximum	≤ .083 mg/L	all year	101
Silver, total [as Ag]	daily average	≤ .11 lb/d	all year	101
Silver, total [as Ag]	daily maximum	≤ .21 lb/d	all year	101
Zinc, total [as Zn]	daily average	≤ .838 mg/L	all year	101
Zinc, total [as Zn]	daily maximum	≤ 1.67 mg/L	all year	101
Zinc, total [as Zn]	daily average	≤ 1.19 lb/d	all year	101
Zinc, total [as Zn]	daily maximum	≤ 1.65 lb/d	all year	101
Titanium, total [as Ti]	daily average	report only (mg/L)	all year	101
Titanium, total [as Ti]	daily maximum	report only (mg/L)	all year	101
Titanium, total [as Ti]	daily average	≤ .159 lb/d	all year	101
Titanium, total [as Ti]	daily maximum	≤ .296 lb/d	all year	101
Flow, in conduit or thru treatment plant	daily average	≤ .3 MGD	all year	101
Flow, in conduit or thru treatment plant	daily maximum	≤ .3 MGD	all year	101
Mercury, total [as Hg]	daily average	report only (mg/L)	all year	101
Mercury, total [as Hg]	daily maximum	≤ .0045 mg/L	all year	101
Mercury, total [as Hg]	daily average	≤ .011 lb/d	all year	101
Mercury, total [as Hg]	daily maximum	≤ .0114 lb/d	all year	101
Whole effluent toxicity - retest #1	48-hour minimum	report only (pass=0;fail=1)	all year	TX1
Whole effluent toxicity - retest #1	monthly average minimum	report only (pass=0;fail=1)	all year	TX1
Whole effluent toxicity - retest #2	48-hour minimum	report only (pass=0;fail=1)	all year	TX1
Whole effluent toxicity - retest #2	monthly average minimum	report only (pass=0;fail=1)	all year	TX1
LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)	48-hour minimum	report only (pass=0;fail=1)	all year	TX1
LF Pass/Fail Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopis bahia)	monthly average minimum	report only (pass=0;fail=1)	all year	TX1
Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia beryllina	48-hour minimum	report only (pass=0;fail=1)	all year	TX1
Low Flow Pass/Fail Static Renewal 48Hr Acute Menidia beryllina	monthly average minimum	report only (pass=0;fail=1)	all year	TX1
NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)	48-hour minimum	report only (%)	all year	TX1
NOAEC Lethal Static Renewal 48HR Acute Americamysis bahia (formerly Mysidopsis bahia)	monthly average minimum	report only (%)	all year	TX1
NOAEC Lethal Static Renewal 48HR Acute Menidia beryllina	48-hour minimum	report only (%)	all year	TX1
NOAEC Lethal Static Renewal 48HR Acute Menidia beryllina	monthly average minimum	report only (%)	all year	TX1
LOAEC Lethal Survival Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)	48-hour minimum	report only (%)	all year	TX1
LOAEC Lethal Survival Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)	monthly average minimum	report only (%)	all year	TX1
LOAEC Lethal Survival Static Renewal 48Hr Acute Menidia beryllina	48-hour minimum	report only (%)	all year	TX1
LOAEC Lethal Survival Static Renewal 48Hr Acute Menidia beryllina	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
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 beryllina	single grab sample	report only (pass=0;fail=1)	all year	TXA

New limits from Nov 1, 2027

Parameter	New limit	New or tighter	Median, last 12 months	× new limit
Hexachlorobutadiene, daily average	0.06 lb/d	tighter	—	—
Hexachlorobutadiene, daily maximum	0.13 lb/d	tighter	—	—

How strict are these limits?

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