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Seminole Electric

Electric Services, major discharger, Palatka, Florida. NPDES permit FL0036498, in force until Jun 24, 2030. Last 12 months: over a limit 7 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 90 days after each period: outfall 001 form 1 monthly (42 values), outfall 001 form Q quarterly (49 values), outfall 002 form 1 monthly (6 values), outfall 003 form 1 monthly (10 values), outfall 006 form 1 monthly (12 values), outfall 008 form 1 monthly (8 values), and 6 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 125 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
April 2026006Mercury, total recoverable, monthly average.041≤ .034 ug/L21%
July 2026001Oil & Grease, daily maximum31≤ 5 mg/L520%
July 2026006Mercury, total recoverable, daily maximum.11≤ .103 ug/L7%
July 2026006Mercury, total recoverable, monthly average.11≤ .034 ug/L224%
August 2026001Oil & Grease, daily maximum22≤ 5 mg/L340%
August 2026006Mercury, total recoverable, daily maximum.34≤ .103 ug/L230%
August 2026006Mercury, total recoverable, monthly average.34≤ .034 ug/L900%

Limits in force (161)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitdaily average≤ 96.3 deg Fall year001
Temperature, water deg. fahrenheitinstantaneous maximum≤ 98.9 deg Fall year001
Temperature, water deg. fahrenheitdaily averagereport only (deg F)all year001
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)all year001
Turbiditymonthly averagereport only (NTU)all year001
Turbiditydaily maximumreport only (NTU)all year001
Turbiditymaximumreport only (NTU)all year001
Turbiditymonthly averagereport only (NTU)all year001
Turbiditydaily maximumreport only (NTU)all year001
Turbiditymonthly average≤ 0 NTUall year001
Turbiditydaily maximum≤ 0 NTUall year001
Specific conductancemonthly averagereport only (umho/cm)all year001
Specific conductanceinstantaneous maximum≤ 8653 umho/cmall year001
Specific conductancemaximumreport only (umho/cm)all year001
pHdaily minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 8.5 SUall year001
pHmaximumreport only (SU)all year001
Oil & Greasemonthly averagereport only (mg/L)all year001
Oil & Greasedaily maximum≤ 5 mg/Lall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]annual total≤ 32478 lb/yrall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year001
Nitrogen, total [as N]annual totalreport only (lb/yr)all year001
Nitrogen, ammonia total [as N]maximum≤ 1.83 mg/Lall year001
Nitrogen, ammonia total [as N]maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]maximumreport only (mg/L)all year001
Nitrogen, Kjeldahl, total [as N]maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]maximumreport only (mg/L)all year001
Phosphorus, total [as P]maximumreport only (mg/L)all year001
Cyanide, total [as CN]monthly averagereport only (ug/L)all year001
Cyanide, total [as CN]daily maximum≤ 19.6 ug/Lall year001
Cyanide, total [as CN]maximumreport only (ug/L)all year001
Hardness, total [as CaCO3]maximumreport only (mg/L)all year001
Arsenic, total recoverablemonthly averagereport only (ug/L)all year001
Arsenic, total recoverabledaily maximum≤ 50 ug/Lall year001
Iron, total recoverablemonthly averagereport only (mg/L)all year001
Iron, total recoverabledaily maximum≤ 1.7 mg/Lall year001
Selenium, total recoverablemonthly averagereport only (ug/L)all year001
Selenium, total recoverabledaily maximum≤ 11.7 ug/Lall year001
Selenium, total recoverablemaximumreport only (ug/L)all year001
Beryllium, total recoverable [as Be]annual average≤ .13 ug/Lall year001
Nickel, total recoverablemonthly averagereport only (ug/L)all year001
Nickel, total recoverabledaily maximumreport only (ug/L)all year001
Nickel, total recoverablemonthly averagereport only (ug/L)all year001
Nickel, total recoverabledaily maximumreport only (ug/L)all year001
Nickel, total recoverablemonthly average≤ 0 ug/Lall year001
Nickel, total recoverabledaily maximum≤ 0 ug/Lall year001
Silver total recoverablemonthly averagereport only (ug/L)all year001
Silver total recoverabledaily maximum≤ .07 ug/Lall year001
Zinc, total recoverablemonthly averagereport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Zinc, total recoverablemonthly averagereport only (ug/L)all year001
Zinc, total recoverabledaily maximumreport only (ug/L)all year001
Zinc, total recoverablemonthly average≤ 0 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 0 ug/Lall year001
Cadmium, total recoverablemaximumreport only (ug/L)all year001
Cadmium, total recoverablemaximumreport only (ug/L)all year001
Cadmium, total recoverablemaximum≤ 0 ug/Lall year001
Lead, total recoverablemonthly averagereport only (ug/L)all year001
Lead, total recoverabledaily maximumreport only (ug/L)all year001
Lead, total recoverablemonthly averagereport only (ug/L)all year001
Lead, total recoverabledaily maximumreport only (ug/L)all year001
Lead, total recoverablemonthly average≤ 0 ug/Lall year001
Lead, total recoverabledaily maximum≤ 0 ug/Lall year001
Copper, total recoverablemonthly averagereport only (ug/L)all year001
Copper, total recoverabledaily maximum≤ 139 ug/Lall year001
Total residual ooxidant-discharge timeinstantaneous maximum≤ 120 min/dall year001
Chromium, trivalent total recoverablemonthly averagereport only (ug/L)all year001
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year001
Chromium, trivalent total recoverablemonthly averagereport only (ug/L)all year001
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year001
Chromium, trivalent total recoverablemonthly average≤ 0 ug/Lall year001
Chromium, trivalent total recoverabledaily maximum≤ 0 ug/Lall year001
Oxidants, total residualmonthly averagereport only (mg/L)all year001
Oxidants, total residualdaily maximum≤ .01 mg/Lall year001
Flow, in conduit or thru treatment plantinstantaneous maximum≤ 7.46 MGDall year001
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantannual averagereport only (MGD)all year001
Temp. diff. between intake and dischargeinstantaneous maximum≤ 26.3 deg Fall year001
Mercury, total recoverablemonthly averagereport only (ug/L)all year001
Mercury, total recoverabledaily maximum≤ .09 ug/Lall year001
Mercury, total recoverablemaximumreport only (ug/L)all year001
LC50 Static Renewal 96Hr Acute Ceriodaphnia dubiaminimum≥ 30 %all year001
LC50 Static Renewal 96Hr Acute Ceriodaphnia dubiaminimum≥ 30 %all year001
LC50 Static Renewal 96Hr Acute Ceriodaphnia dubiaminimum≥ 30 %all year001
LC50 Static Renewal 96Hr Acute Cyprinella leedsiminimum≥ 30 %all year001
LC50 Static Renewal 96Hr Acute Cyprinella leedsiminimum≥ 30 %all year001
LC50 Static Renewal 96Hr Acute Cyprinella leedsiminimum≥ 30 %all year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 81 mg/Lall year002
Oil & Greasemonthly average≤ 12 mg/Lall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
BOD, 5-day, 20 deg. Cdaily average≤ 60 mg/Lall year003
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/Lall year003
BOD, 5-day, 20 deg. Cannual average≤ 20 mg/Lall year003
Solids, total suspendeddaily average≤ 60 mg/Lall year003
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year003
Solids, total suspendedannual average≤ 20 mg/Lall year003
Flow, in conduit or thru treatment plantdaily average≤ .018 MGDall year003
Chlorine, total residualminimum≥ .5 mg/Lall year003
E. colimonthly geometric mean≤ 126 #/100mLall year003
E. coli90% of samples≤ 410 #/100mLall year003
Solids, total suspendedmonthly average≤ 30 mg/Lall year006
Solids, total suspendeddaily maximum≤ 100 mg/Lall year006
Nitrite + Nitrate total [as N]daily maximum≤ 4 mg/Lall year006
Nitrite + Nitrate total [as N]monthly average≤ 3 mg/Lall year006
Cyanide, total [as CN]maximumreport only (mg/L)all year006
Arsenic, total recoverablemonthly average≤ 8 ug/Lall year006
Arsenic, total recoverabledaily maximum≤ 18 ug/Lall year006
Selenium, total recoverablemonthly average≤ 29 ug/Lall year006
Selenium, total recoverabledaily maximum≤ 70 ug/Lall year006
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (MGD)all year006
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year006
Mercury, total recoverablemonthly average≤ .034 ug/Lall year006
Mercury, total recoverabledaily maximum≤ .103 ug/Lall year006
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year008
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)all year008
Specific conductancemonthly averagereport only (umho/cm)all year008
Specific conductanceinstantaneous maximumreport only (umho/cm)all year008
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (MGD)all year008
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year008
Chlorine, total residualmonthly average≤ .2 mg/Lall year008
Chlorine, total residualinstantaneous maximum≤ .5 mg/Lall year008
BOD, 5-day, 20 deg. Cdaily average≤ 60 mg/Lall year009
BOD, 5-day, 20 deg. Cmaximum monthly average≤ 30 mg/Lall year009
BOD, 5-day, 20 deg. Cannual average≤ 20 mg/Lall year009
Solids, total suspendeddaily average≤ 60 mg/Lall year009
Solids, total suspendedmaximum monthly average≤ 30 mg/Lall year009
Solids, total suspendedannual average≤ 20 mg/Lall year009
Flow, in conduit or thru treatment plantdaily average≤ 1800 gal/dall year009
Chlorine, total residualweekly minimum≥ .5 mg/Lall year009
E. colimonthly geometric mean≤ 126 #/100mLall year009
E. coli90th percentile≤ 410 #/100mLall year009
Solids, total suspendedmonthly average≤ 30 mg/Lall year010
Solids, total suspendeddaily maximum≤ 100 mg/Lall year010
Oil & Greasemonthly average≤ 15 mg/Lall year010
Oil & Greasedaily maximum≤ 20 mg/Lall year010
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year010
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year010
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year04A
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)all year04A
Specific conductancemonthly averagereport only (umho/cm)all year04A
Specific conductanceinstantaneous maximumreport only (umho/cm)all year04A
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (MGD)all year04A
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year04A
Chlorine, total residualmonthly average≤ .2 mg/Lall year04A
Chlorine, total residualinstantaneous maximum≤ .5 mg/Lall year04A
Temperature, water deg. fahrenheitmonthly averagereport only (deg F)all year04B
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)all year04B
Specific conductancemonthly averagereport only (umho/cm)all year04B
Specific conductanceinstantaneous maximumreport only (umho/cm)all year04B
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (MGD)all year04B
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year04B
Chlorine, total residualmonthly average≤ .2 mg/Lall year04B
Chlorine, total residualinstantaneous maximum≤ .5 mg/Lall year04B

How strict are these limits?

Cited limits by parameter: Florida's rules and the federal ones.

Same industry: the 30 Electric Services permits in Florida.

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