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Oil And Gas Field Services, Houma, Louisiana. NPDES permit LA0127742, in force until Dec 31, 2028. Last 12 months: over a limit once (last December 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | Mercury, total [as Hg], monthly average | .000121 mg/L | ≤ .00005 mg/L | 142% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen demand, chem. [low level] [COD] | daily maximum | report only (mg/L) | all year | 001 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 001 |
| Aluminum, total recoverable | daily maximum | report only (mg/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 |
| Oxygen demand, chem. [low level] [COD] | daily maximum | report only (mg/L) | all year | 002 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 002 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 002 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 002 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 002 |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | 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 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 003 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | 003 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year | 003 |
| Oxygen demand, chem. [low level] [COD] | daily maximum | report only (mg/L) | all year | 004 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 004 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 004 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 004 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 004 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 004 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 004 |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Oxygen demand, chem. [low level] [COD] | daily maximum | report only (mg/L) | all year | 005 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 005 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 005 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 005 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 005 |
| Carbon, tot organic [TOC] | daily maximum | ≤ 50 mg/L | all year | 005 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 005 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 005 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 005 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 005 |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 006 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 006 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 006 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 006 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 006 |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 006 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 006 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 006 |
| Coliform, fecal general | monthly geometric mean | ≤ 200 #/100mL | all year | 006 |
| Coliform, fecal general | daily maximum | ≤ 400 #/100mL | all year | 006 |
| pH | instantaneous minimum | ≥ 6 SU | all year | 201 |
| pH | instantaneous maximum | ≤ 9 SU | all year | 201 |
| Solids, total suspended | monthly average | ≤ 30.6 mg/L | all year | 201 |
| Solids, total suspended | daily maximum | ≤ 74.1 mg/L | all year | 201 |
| Oil & Grease | monthly average | ≤ 38 mg/L | all year | 201 |
| Oil & Grease | daily maximum | ≤ 127 mg/L | all year | 201 |
| Arsenic, total [as As] | monthly average | ≤ .306 mg/L | all year | 201 |
| Arsenic, total [as As] | daily maximum | ≤ .727 mg/L | all year | 201 |
| Cadmium, total [as Cd] | monthly average | ≤ .0102 mg/L | all year | 201 |
| Cadmium, total [as Cd] | daily maximum | ≤ .0172 mg/L | all year | 201 |
| Chromium, total [as Cr] | monthly average | ≤ .323 mg/L | all year | 201 |
| Chromium, total [as Cr] | daily maximum | ≤ .746 mg/L | all year | 201 |
| Cobalt, total [as Co] | monthly average | ≤ 18.8 mg/L | all year | 201 |
| Cobalt, total [as Co] | daily maximum | ≤ 56.4 mg/L | all year | 201 |
| Copper, total [as Cu] | monthly average | ≤ .047 mg/L | all year | 201 |
| Copper, total [as Cu] | daily maximum | ≤ .112 mg/L | all year | 201 |
| Lead, total [as Pb] | monthly average | ≤ .033 mg/L | all year | 201 |
| Lead, total [as Pb] | daily maximum | ≤ .08 mg/L | all year | 201 |
| Zinc, total [as Zn] | monthly average | ≤ .334 mg/L | all year | 201 |
| Zinc, total [as Zn] | daily maximum | ≤ .793 mg/L | all year | 201 |
| Tin, total [as Sn] | monthly average | ≤ .165 mg/L | all year | 201 |
| Tin, total [as Sn] | daily maximum | ≤ .335 mg/L | all year | 201 |
| Butyl benzyl phthalate | monthly average | ≤ .0887 mg/L | all year | 201 |
| Butyl benzyl phthalate | daily maximum | ≤ .188 mg/L | all year | 201 |
| Fluoranthene | monthly average | ≤ .0268 mg/L | all year | 201 |
| Fluoranthene | daily maximum | ≤ .0537 mg/L | all year | 201 |
| Di[2-ethylhexyl] phthalate [DEHP] | monthly average | ≤ .101 mg/L | all year | 201 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | ≤ .215 mg/L | all year | 201 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 201 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 201 |
| Mercury, total [as Hg] | monthly average | ≤ .00005 mg/L | all year | 201 |
| Mercury, total [as Hg] | daily maximum | ≤ .00013 mg/L | all year | 201 |
| n-Decane | monthly average | ≤ .437 mg/L | all year | 201 |
| n-Decane | daily maximum | ≤ .948 mg/L | all year | 201 |
| Carbazole | monthly average | ≤ .276 mg/L | all year | 201 |
| Carbazole | daily maximum | ≤ .598 mg/L | all year | 201 |
| n-Octadecane | monthly average | ≤ .302 mg/L | all year | 201 |
| n-Octadecane | daily maximum | ≤ .589 mg/L | all year | 201 |
Cited limits by parameter: Louisiana's rules and the federal ones.
Same industry: the 56 Oil and Gas Extraction permits in Louisiana.
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