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St Johns County Utility Dept

Sewage treatment plant, St Augustine, Florida. NPDES permit FL0670651, in force until Dec 27, 2026. Last 12 months: over a limit 5 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 1 monthly (56 values), form U every 24 months
Renewal application due
Jun 30, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 1 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025% of fecal coliform samples < detectable, monthly total100 %≤ 75 %33%
December 2025% of fecal coliform samples < detectable, monthly total100≤ 75 %33%
January 2026% of fecal coliform samples < detectable, monthly total100≤ 75 %33%
February 2026% of fecal coliform samples < detectable, monthly total83≤ 75 %11%
August 2026% of fecal coliform samples < detectable, monthly total100≤ 75 %33%

Limits in force (58)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademaximumreport only (deg C)all year
Plant capacity fact. percent of capacitymonthly totalreport only (%)all year
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmaximum≤ 5 mg/Lall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, total [as N]maximum≤ 6 mg/Lall year
Nitrogen, total [as N]weekly average≤ 4.5 mg/Lall year
Nitrogen, total [as N]monthly average≤ 3.75 mg/Lall year
Nitrogen, total [as N]monthly totalreport only (lb/mo)all year
Nitrogen, total [as N]annual total≤ 12943 lb/yrall year
Nitrogen, total [as N]annual average≤ 3 mg/Lall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 0 mg/Lall year
Nitrogen, ammonia total [as N]maximum≤ 0 mg/Lall year
Phosphorus, total [as P]maximum≤ 2 mg/Lall year
Phosphorus, total [as P]weekly average≤ 1.5 mg/Lall year
Phosphorus, total [as P]monthly average≤ 1.25 mg/Lall year
Phosphorus, total [as P]monthly totalreport only (lb/mo)all year
Phosphorus, total [as P]annual total≤ 3799 lb/yrall year
Phosphorus, total [as P]annual average≤ 1 mg/Lall year
Hardness, total [as CaCO3]maximumreport only (mg/L)all year
Iron, total recoverablemaximum≤ 1 mg/Lall year
Silver total recoverablemaximum≤ .07 ug/Lall year
Lead, total recoverablemaximumreport only (ug/L)all year
Lead, total recoverablemaximumreport only (ug/L)all year
Lead, total recoverablemaximum≤ 0 ug/Lall year
Ultraviolet light intensitymaximumreport only (mW/cm2)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantannual average≤ 3 MGDall year
Flow, in conduit or thru treatment plantquarterly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantannual average≤ 3 MGDall year
% of fecal coliform samples < detectablemonthly total≤ 75 %all year
E. colimonthly geometric mean≤ 126 #/100mLall year
E. coli90th percentile≤ 410 #/100mLall year
Ultraviolet light transmittanceminimum≥ 55 %all year
Ultraviolet light dosageminimum≥ 100 mW-sec/cm2all year
Mercury, total recoverablemaximum≤ .012 ug/Lall year
Mercury, total recoverablemaximum≤ .012 ug/Lall year
Coliform, fecal generalmaximum≤ 25 #/100mLall year
BOD, carbonaceous [5 day, 20 C]maximum≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 7.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6.25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]annual average≤ 5 mg/Lall year
Flow, totalannual total≤ 328.5 Mgal/yrall year
Flow, totalmonthly totalreport only (Mgal/mo)all year
LC50 Static Renewal 96Hr Acute Ceriodaphnia dubiaminimum≥ 100 %all year
LC50 Static Renewal 96Hr Acute Ceriodaphnia dubiaminimum≥ 100 %all year
LC50 Static Renewal 96Hr Acute Ceriodaphnia dubiaminimum≥ 100 %all year
LC50 Static Renewal 96Hr Acute Cyprinella leedsiminimum≥ 100 %all year
LC50 Static Renewal 96Hr Acute Cyprinella leedsiminimum≥ 100 %all year
LC50 Static Renewal 96Hr Acute Cyprinella leedsiminimum≥ 100 %all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/FL0670651 · MCP: https://passage-data.com/mcp