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Electric Services, major discharger, Wilsonville, Alabama. NPDES permit AL0003140 expired Mar 31, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | ≤ 90 deg F | Jun–Sep | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Jun–Sep | 001 |
| Temperature, water deg. fahrenheit | monthly average | ≤ 93 deg F | Jun–Sep | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Jun–Sep | 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 |
| Chlorine, total residual | monthly average | ≤ .012 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .016 mg/L | all year | 001 |
| Chlorination duration | daily maximum | ≤ 120 min/d | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | monthly average | ≤ 90 deg F | Jun–Sep | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Jun–Sep | 002 |
| Temperature, water deg. fahrenheit | monthly average | ≤ 93 deg F | Jun–Sep | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Jun–Sep | 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 |
| Chlorine, total residual | monthly average | ≤ .012 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .016 mg/L | all year | 002 |
| Chlorination duration | daily maximum | ≤ 120 min/d | all year | 002 |
| Turbidity | monthly average | report only (NTU) | all year | 004 |
| Turbidity | daily maximum | report only (NTU) | all year | 004 |
| pH | daily minimum | ≥ 6 SU | all year | 004 |
| pH | daily minimum | ≥ 6 SU | all year | 004 |
| pH | daily maximum | ≤ 9 SU | all year | 004 |
| pH | daily maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | ≤ 24.4 mg/L | all year | 004 |
| Solids, total suspended | monthly average | ≤ 25.2 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 69.4 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 73.7 mg/L | all year | 004 |
| Oil & Grease | monthly average | ≤ 11 mg/L | all year | 004 |
| Oil & Grease | monthly average | ≤ 11 mg/L | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 004 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Apr–Oct | 004 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Apr–Oct | 004 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | Apr–Oct | 004 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | Apr–Oct | 004 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | Apr–Oct | 004 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (lb/d) | Apr–Oct | 004 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | Apr–Oct | 004 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Apr–Oct | 004 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | Apr–Oct | 004 |
| Nitrite + Nitrate total [as N] | monthly average | report only (lb/d) | Apr–Oct | 004 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (lb/d) | Apr–Oct | 004 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (lb/d) | Apr–Oct | 004 |
| Phosphorus, total [as P] | monthly average | ≤ .25 mg/L | Apr–Oct | 004 |
| Phosphorus, total [as P] | monthly average | ≤ .25 mg/L | Apr–Oct | 004 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Apr–Oct | 004 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | Apr–Oct | 004 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | Apr–Oct | 004 |
| Phosphorus, total [as P] | monthly average | report only (lb/d) | Apr–Oct | 004 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | Apr–Oct | 004 |
| Phosphorus, total [as P] | daily maximum | report only (lb/d) | Apr–Oct | 004 |
| Cadmium, total [as Cd] | monthly average | report only (mg/L) | all year | 004 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 004 |
| Chromium, total [as Cr] | monthly average | report only (mg/L) | all year | 004 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 004 |
| Copper, total [as Cu] | monthly average | report only (mg/L) | all year | 004 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 004 |
| Lead, total [as Pb] | monthly average | report only (mg/L) | all year | 004 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 004 |
| Nickel, total [as Ni] | monthly average | report only (mg/L) | all year | 004 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 004 |
| Zinc, total [as Zn] | monthly average | report only (mg/L) | all year | 004 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 004 |
| Selenium, total [as Se] | monthly average | report only (mg/L) | all year | 004 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 004 |
| Arsenic, trivalent dissolved | monthly average | ≤ .0245 mg/L | all year | 004 |
| Arsenic, trivalent dissolved | monthly average | ≤ .02075 mg/L | all year | 004 |
| Arsenic, trivalent dissolved | daily maximum | report only (mg/L) | all year | 004 |
| Arsenic, trivalent dissolved | 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 | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Chlorine, total residual | monthly average | ≤ .7 mg/L | all year | 004 |
| Chlorine, total residual | monthly average | ≤ .7 mg/L | all year | 004 |
| Chlorine, total residual | daily maximum | ≤ 1 mg/L | all year | 004 |
| Chlorine, total residual | daily maximum | ≤ 1 mg/L | all year | 004 |
| E. coli | monthly average | report only (#/100mL) | all year | 004 |
| E. coli | daily maximum | report only (#/100mL) | all year | 004 |
| E. coli | daily maximum | report only (#/100mL) | all year | 004 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 004 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 004 |
| Mercury, total [as Hg] | monthly average | report only (mg/L) | all year | 004 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 004 |
| Iron, total [as Fe] | monthly average | report only (mg/L) | all year | 004 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 004 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | report only (mg/L) | all year | 004 |
| pH | daily minimum | ≥ 6 SU | all year | 019 |
| pH | daily minimum | report only (SU) | all year | 019 |
| pH | daily maximum | ≤ 8.5 SU | all year | 019 |
| pH | daily maximum | report only (SU) | all year | 019 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 019 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 019 |
| Chromium, total [as Cr] | monthly average | ≤ .2 mg/L | all year | 019 |
| Chromium, total [as Cr] | daily maximum | ≤ .2 mg/L | all year | 019 |
| Zinc, total [as Zn] | monthly average | ≤ 1 mg/L | all year | 019 |
| Zinc, total [as Zn] | daily maximum | ≤ 1 mg/L | all year | 019 |
| Priority Pollutants | monthly average | ≤ 0 ug/L | all year | 019 |
| Priority Pollutants | daily maximum | ≤ 0 ug/L | all year | 019 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 019 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 019 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 019 |
| Chlorine, total residual | daily maximum | ≤ .019 mg/L | all year | 019 |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 019 |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 019 |
| Semiannual Certification Statement | daily maximum | ≤ 0 Y=0;N=1 | all year | 019 |
| Chlorination duration | daily maximum | ≤ 120 min/d | all year | 019 |
| Turbidity | daily maximum | report only (NTU) | all year | 028 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 028 |
| pH | daily minimum | report only (SU) | all year | 028 |
| pH | daily maximum | report only (SU) | all year | 028 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 028 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 028 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 028 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 028 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 028 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 028 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 028 |
| Arsenic, total recoverable | daily maximum | report only (mg/L) | all year | 028 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 028 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 028 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 028 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 028 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 028 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 028 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 028 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 028 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 028 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 028 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 028 |
| Turbidity | daily maximum | report only (NTU) | all year | 029 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 029 |
| pH | daily minimum | report only (SU) | all year | 029 |
| pH | daily maximum | report only (SU) | all year | 029 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 029 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 029 |
| Nitrogen, organic total [as N] | daily maximum | report only (mg/L) | all year | 029 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 029 |
| Nitrogen, Kjeldahl, total [as N] | daily maximum | report only (mg/L) | all year | 029 |
| Nitrite + Nitrate total [as N] | daily maximum | report only (mg/L) | all year | 029 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 029 |
| Arsenic, total recoverable | daily maximum | report only (mg/L) | all year | 029 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 029 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 029 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 029 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 029 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 029 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year | 029 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 029 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 029 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 029 |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year | 029 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 029 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | ≤ 0 pass=0;fail=1 | all year | 042 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | ≤ 0 pass=0;fail=1 | all year | 042 |
| Toxicity [chronic], Ceriodaphnia dubia | single sample | ≤ 0 pass=0;fail=1 | all year | 043 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | single sample | ≤ 0 pass=0;fail=1 | all year | 043 |
| Chromium, total [as Cr] | monthly average | ≤ .2 mg/L | all year | 04A |
| Chromium, total [as Cr] | daily maximum | ≤ .2 mg/L | all year | 04A |
| Zinc, total [as Zn] | monthly average | ≤ 1 mg/L | all year | 04A |
| Zinc, total [as Zn] | daily maximum | ≤ 1 mg/L | all year | 04A |
| Priority Pollutants | monthly average | ≤ 0 ug/L | all year | 04A |
| Priority Pollutants | daily maximum | ≤ 0 ug/L | all year | 04A |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 04A |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 04A |
| Chlorine, free available | monthly average | ≤ .2 mg/L | all year | 04A |
| Chlorine, free available | daily maximum | ≤ .5 mg/L | all year | 04A |
| Annual Certification Statement | daily maximum | ≤ 0 Y=0;N=1 | all year | 04A |
| Chlorination duration | daily maximum | ≤ 120 min/d | all year | 04A |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 04B |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 04B |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 04B |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 04B |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | 04B |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 40 mg/L | all year | 04B |
| pH | daily minimum | ≥ 6 SU | all year | 04C |
| pH | daily maximum | ≤ 10.5 SU | all year | 04C |
| Copper, total [as Cu] | monthly average | ≤ 1 mg/L | all year | 04C |
| Copper, total [as Cu] | daily maximum | ≤ 1 mg/L | all year | 04C |
| Iron, total [as Fe] | monthly average | ≤ 1 mg/L | all year | 04C |
| Iron, total [as Fe] | daily maximum | ≤ 1 mg/L | all year | 04C |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 04C |
| Nitrite + Nitrate total [as N] | monthly average | ≤ 4.4 mg/L | all year | 04F |
| Nitrite + Nitrate total [as N] | daily maximum | ≤ 17 mg/L | all year | 04F |
| Arsenic, total [as As] | monthly average | ≤ 8 ug/L | all year | 04F |
| Arsenic, total [as As] | daily maximum | ≤ 11 ug/L | all year | 04F |
| Selenium, total [as Se] | monthly average | ≤ 12 ug/L | all year | 04F |
| Selenium, total [as Se] | daily maximum | ≤ 23 ug/L | all year | 04F |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 04F |
| Mercury, total [as Hg] | monthly average | ≤ 356 ng/L | all year | 04F |
| Mercury, total [as Hg] | daily maximum | ≤ 788 ng/L | all year | 04F |
Cited limits by parameter: Alabama's rules and the federal ones.
Same industry: the 23 Electric Services permits in Alabama.
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