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Electric Services, major discharger, Petersburg, Indiana. NPDES permit IN0002887, in force until May 31, 2030. Last 12 months: over a limit 8 times (last May 2026), 2 required values missing, 1 of 44 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| November 2025 | 001 | Iron, total recoverable, daily maximum | 2.97 mg/L | ≤ 1 mg/L | 197% |
| November 2025 | 001 | Iron, total recoverable, monthly average | 1.963 mg/L | ≤ 1 mg/L | 96% |
| December 2025 | 001 | Iron, total recoverable, daily maximum | 3.86 mg/L | ≤ 1 mg/L | 286% |
| December 2025 | 001 | Iron, total recoverable, monthly average | 2.051 mg/L | ≤ 1 mg/L | 105% |
| January 2026 | 007 | Boron, total recoverable, monthly average | 9.47 mg/L | ≤ 8.3 mg/L | 14% |
| March 2026 | 001 | Iron, total recoverable, daily maximum | 2.32 mg/L | ≤ 1 mg/L | 132% |
| March 2026 | 001 | Iron, total recoverable, monthly average | 1.5 mg/L | ≤ 1 mg/L | 50% |
| May 2026 | 001 | Oil and grease, hexane extr method, monthly average | 6.1 mg/L | ≤ 5.3 mg/L | 15% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jan, Feb | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Mar | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Apr, Nov | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | May | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Jun–Sep | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Oct | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | Dec | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Jan, Feb | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Mar | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Apr, Nov | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | May | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Jun–Sep | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Oct | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 29.7 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 98.1 mg/L | all year | 001 |
| Oil and grease, hexane extr method | monthly average | ≤ 5.3 mg/L | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 6.4 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May–Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Dec | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, free [as free] | monthly average | report only (mg/L) | all year | 001 |
| Cyanide, free [as free] | daily maximum | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 001 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | all year | 001 |
| Sulfate, total [as SO4] | daily maximum | report only (mg/L) | all year | 001 |
| Fluoride, total [as F] | monthly average | report only (mg/L) | all year | 001 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 001 |
| Arsenic, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Arsenic, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Iron, total recoverable | monthly average | ≤ 1 mg/L | all year | 001 |
| Iron, total recoverable | daily maximum | ≤ 1 mg/L | all year | 001 |
| Selenium, total recoverable | monthly average | ≤ .033 mg/L | all year | 001 |
| Selenium, total recoverable | daily maximum | ≤ .057 mg/L | all year | 001 |
| Boron, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Boron, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Nickel, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total recoverable | monthly average | ≤ .002 mg/L | all year | 001 |
| Cadmium, total recoverable | daily maximum | ≤ .0035 mg/L | all year | 001 |
| Lead, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Lead, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Chromium, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total recoverable | monthly average | ≤ .022 mg/L | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ .039 mg/L | all year | 001 |
| Manganese, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Manganese, 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 |
| 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 |
| 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 | < .06 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | < .06 mg/L | all year | 001 |
| Cycles Of Concentration | monthly average | report only (c) | all year | 001 |
| Cycles Of Concentration | daily maximum | report only (c) | all year | 001 |
| Cycles Of Concentration | monthly average | report only (c) | all year | 001 |
| Cycles Of Concentration | daily maximum | report only (c) | all year | 001 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Mercury, total recoverable | monthly average | ≤ 12 ng/L | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Mercury, total recoverable | daily maximum | ≤ 20 ng/L | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Chlorination duration | daily maximum | ≤ 120 min/d | all year | 001 |
| Flow, total | monthly total | report only (Mgal/mo) | 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 |
| Chlorine, total residual [dsg. time] | daily maximum | ≤ 120 min/d | all year | 002 |
| pH | daily minimum | ≥ 6 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Aluminum, total recoverable | daily maximum | report only (mg/L) | all year | 002 |
| Aluminum, dissolved [as Al] | 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 |
| Chlorine, total residual | monthly average | < .06 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .2 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | < .06 mg/L | all year | 002 |
| Chlorination frequency | daily maximum | ≤ 4 occur/d | all year | 002 |
| Chlorination duration | daily maximum | ≤ 40 min | all year | 002 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 002 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 007 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 007 |
| pH | daily minimum | ≥ 6 SU | all year | 007 |
| pH | daily maximum | ≤ 9 SU | all year | 007 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 007 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | May–Nov | 007 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Dec | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May–Nov | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan, Feb, Mar, Apr, Dec | 007 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 007 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 007 |
| Cyanide, free [as free] | monthly average | report only (mg/L) | all year | 007 |
| Cyanide, free [as free] | daily maximum | report only (mg/L) | all year | 007 |
| Chloride [as Cl] | monthly average | report only (mg/L) | all year | 007 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 007 |
| Sulfate, total [as SO4] | monthly average | ≤ 1500 mg/L | all year | 007 |
| Sulfate, total [as SO4] | daily maximum | ≤ 2600 mg/L | all year | 007 |
| Fluoride, total [as F] | monthly average | report only (mg/L) | all year | 007 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 007 |
| Arsenic, total recoverable | monthly average | report only (mg/L) | all year | 007 |
| Arsenic, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Iron, total recoverable | monthly average | report only (mg/L) | all year | 007 |
| Iron, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Selenium, total recoverable | monthly average | ≤ .033 mg/L | all year | 007 |
| Selenium, total recoverable | daily maximum | ≤ .057 mg/L | all year | 007 |
| Boron, total recoverable | monthly average | ≤ 8.3 mg/L | all year | 007 |
| Boron, total recoverable | daily maximum | ≤ 14 mg/L | all year | 007 |
| Nickel, total recoverable | monthly average | report only (mg/L) | all year | 007 |
| Nickel, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Zinc, total recoverable | monthly average | report only (mg/L) | all year | 007 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Cadmium, total recoverable | monthly average | ≤ .002 mg/L | all year | 007 |
| Cadmium, total recoverable | daily maximum | ≤ .0035 mg/L | all year | 007 |
| Lead, total recoverable | monthly average | report only (mg/L) | all year | 007 |
| Lead, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Chromium, total recoverable | monthly average | report only (mg/L) | all year | 007 |
| Chromium, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Copper, total recoverable | monthly average | report only (mg/L) | all year | 007 |
| Copper, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Manganese, total recoverable | monthly average | report only (mg/L) | all year | 007 |
| Manganese, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Solids, total dissolved | monthly average | report only (mg/L) | all year | 007 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 007 |
| Mercury, total recoverable | monthly average | ≤ 12 ng/L | Feb, Apr, Jun, Aug, Oct, Dec | 007 |
| Mercury, total recoverable | daily maximum | ≤ 20 ng/L | Feb, Apr, Jun, Aug, Oct, Dec | 007 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 007 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 101 |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 101 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 101 |
| Chlorine, total residual | daily minimum | > .5 mg/L | Apr–Oct | 101 |
| E. coli, colony forming units [CFU] | monthly geometric mean | ≤ 125 CFU/100mL | Apr–Oct | 101 |
| E. coli, colony forming units [CFU] | daily maximum | ≤ 235 CFU/100mL | Apr–Oct | 101 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Boron, total recoverable, daily maximum outfall 001 | 13 mg/L | new | 13.2 mg/L (11 values) | 1.02× |
| Boron, total recoverable, monthly average outfall 001 | 7.3 mg/L | new | 9.32 mg/L (11 values) | 1.28× |
| Selenium, total recoverable, daily maximum outfall 001 | 0.0075 mg/L | tighter | 0.01 mg/L (11 values) | 1.33× |
| Selenium, total recoverable, monthly average outfall 001 | 0.0031 mg/L | tighter | 0.0065 mg/L (11 values) | 2.1× |
| Temperature, water deg. fahrenheit, daily maximum outfall 001 | 93 deg F (Jun–Sep) | new | 95 deg F (3 values) | 1.02× |
| Selenium, total recoverable, monthly average outfall 007 | 0.0031 mg/L | tighter | 0.0045 mg/L (11 values) | 1.45× |
| Cadmium, total recoverable, daily maximum outfall 001 | 0.0025 mg/L | tighter | 0.0001 mg/L (11 values) | 0.04× |
| Cadmium, total recoverable, monthly average outfall 001 | 0.0015 mg/L | tighter | 0.0001 mg/L (11 values) | 0.0667× |
| Cyanide, free [as free], daily maximum outfall 001 | 0.0085 mg/L | new | 0.003 mg/L (11 values) | 0.353× |
| Cyanide, free [as free], monthly average outfall 001 | 0.0049 mg/L | new | 0.003 mg/L (11 values) | 0.612× |
| Fluoride, total [as F], daily maximum outfall 001 | 3.3 mg/L | new | 1.09 mg/L (11 values) | 0.33× |
| Fluoride, total [as F], monthly average outfall 001 | 1.9 mg/L | new | 0.91 mg/L (11 values) | 0.479× |
| Nitrogen, ammonia total [as N], daily maximum outfall 001 | 7.7 mg/L (Jan, Feb, Mar, Apr, Dec) | new | 2.73 mg/L (5 values) | 0.355× |
| Nitrogen, ammonia total [as N], daily maximum outfall 001 | 3.9 mg/L (May–Nov) | new | 0.395 mg/L (6 values) | 0.101× |
| Nitrogen, ammonia total [as N], monthly average outfall 001 | 3.2 mg/L (Jan, Feb, Mar, Apr, Dec) | new | 2.37 mg/L (5 values) | 0.741× |
| Nitrogen, ammonia total [as N], monthly average outfall 001 | 1.6 mg/L (May–Nov) | new | 0.325 mg/L (6 values) | 0.203× |
| Temperature, water deg. fahrenheit, daily maximum outfall 001 | 63 deg F (Mar) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum outfall 001 | 83 deg F (May) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum outfall 001 | 81 deg F (Oct) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum outfall 001 | 73 deg F (Apr, Nov) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum outfall 001 | 53 deg F (Jan, Feb) | new | — | — |
| Temperature, water deg. fahrenheit, daily maximum outfall 001 | 60 deg F (Dec) | new | — | — |
| Boron, total recoverable, daily maximum outfall 007 | 13 mg/L | tighter | 4.21 mg/L (11 values) | 0.324× |
| Boron, total recoverable, monthly average outfall 007 | 7.3 mg/L | tighter | 3.57 mg/L (11 values) | 0.489× |
| Cadmium, total recoverable, daily maximum outfall 007 | 0.0025 mg/L | tighter | 0.0002 mg/L (11 values) | 0.08× |
| Cadmium, total recoverable, monthly average outfall 007 | 0.0015 mg/L | tighter | 0.0002 mg/L (11 values) | 0.133× |
| Chloride [as Cl], daily maximum outfall 007 | 550 mg/L | new | 84.7 mg/L (11 values) | 0.154× |
| Chloride [as Cl], monthly average outfall 007 | 320 mg/L | new | 61.8 mg/L (11 values) | 0.193× |
| Copper, total recoverable, daily maximum outfall 007 | 0.04 mg/L | new | 0.001 mg/L (11 values) | 0.025× |
| Copper, total recoverable, monthly average outfall 007 | 0.023 mg/L | new | 0.001 mg/L (11 values) | 0.0435× |
| Cyanide, free [as free], daily maximum outfall 007 | 0.0085 mg/L | new | 0.003 mg/L (11 values) | 0.353× |
| Cyanide, free [as free], monthly average outfall 007 | 0.0049 mg/L | new | 0.003 mg/L (11 values) | 0.612× |
| Fluoride, total [as F], daily maximum outfall 007 | 3.3 mg/L | new | 0.49 mg/L (11 values) | 0.148× |
| Fluoride, total [as F], monthly average outfall 007 | 1.9 mg/L | new | 0.47 mg/L (11 values) | 0.247× |
| Manganese, total recoverable, daily maximum outfall 007 | 6.7 mg/L | new | 0.254 mg/L (11 values) | 0.0379× |
| Manganese, total recoverable, monthly average outfall 007 | 3.9 mg/L | new | 0.247 mg/L (11 values) | 0.0633× |
| Nickel, total recoverable, daily maximum outfall 007 | 0.17 mg/L | new | 0.002 mg/L (11 values) | 0.0118× |
| Nickel, total recoverable, monthly average outfall 007 | 0.1 mg/L | new | 0.002 mg/L (11 values) | 0.02× |
| Nitrogen, ammonia total [as N], daily maximum outfall 007 | 7.7 mg/L (Jan, Feb, Mar, Apr, Dec) | new | 0.55 mg/L (5 values) | 0.0714× |
| Nitrogen, ammonia total [as N], daily maximum outfall 007 | 3.9 mg/L (May–Nov) | new | 0.25 mg/L (6 values) | 0.0641× |
| Nitrogen, ammonia total [as N], monthly average outfall 007 | 3.2 mg/L (Jan, Feb, Mar, Apr, Dec) | new | 0.49 mg/L (5 values) | 0.153× |
| Nitrogen, ammonia total [as N], monthly average outfall 007 | 1.6 mg/L (May–Nov) | new | 0.25 mg/L (6 values) | 0.156× |
| Selenium, total recoverable, daily maximum outfall 007 | 0.0075 mg/L | tighter | 0.005 mg/L (11 values) | 0.667× |
| Sulfate, total [as SO4], daily maximum outfall 007 | 2500 mg/L | tighter | 976 mg/L (11 values) | 0.39× |
| Zinc, total recoverable, daily maximum outfall 007 | 0.4 mg/L | new | 0.02 mg/L (11 values) | 0.05× |
| Zinc, total recoverable, monthly average outfall 007 | 0.23 mg/L | new | 0.02 mg/L (11 values) | 0.087× |
Cited limits by parameter: Indiana's rules and the federal ones.
Same industry: the 30 Electric Services permits in Indiana.
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