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Dawson Springs STP

Sewage treatment plant, Dawson Springs, Kentucky. NPDES permit KY0023868, in force until Jan 31, 2030. Last 12 months: over a limit 22 times (last August 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 1 monthly (37 values), form 4 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
12 values over a limit, 24 required values missing, 0 of 14 reports late

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

All 22 values over a limit
Period endingParameterReportedLimitOver by
October 2025Solids, suspended percent removal, monthly average minimum77.36 %≥ 85 %51%
October 2025Solids, total suspended, monthly average31.65 mg/L≤ 30 mg/L6%
October 2025Solids, total suspended, maximum weekly average57.6 mg/L≤ 45 mg/L28%
November 2025Nitrogen, ammonia total [as N], daily maximum22.8 mg/L≤ 13.5 mg/L69%
November 2025Nitrogen, ammonia total [as N], monthly average11.52 mg/L≤ 9 mg/L28%
January 2026Nitrogen, ammonia total [as N], daily maximum27.9 mg/L≤ 13.5 mg/L107%
January 2026Nitrogen, ammonia total [as N], daily maximum47.7 lb/d≤ 41 lb/d16%
January 2026Nitrogen, ammonia total [as N], monthly average14.08 mg/L≤ 9 mg/L56%
February 2026Nitrogen, ammonia total [as N], daily maximum19.9 mg/L≤ 13.5 mg/L47%
February 2026Nitrogen, ammonia total [as N], monthly average10.08 mg/L≤ 9 mg/L12%
February 2026Nitrogen, ammonia total [as N], monthly average29.51 lb/d≤ 27.3 lb/d8%
March 2026BOD, carbonaceous [5 day, 20 C], daily maximum117.92 lb/d≤ 45.5 lb/d159%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average68.34 lb/d≤ 30.4 lb/d125%
March 2026E. coli, 30-day geometric mean168.97 #/100mL≤ 130 #/100mL30%
March 2026E. coli, 7-day geometric mean476 #/100mL≤ 240 #/100mL98%
April 2026BOD, carbonaceous [5 day, 20 C], daily maximum819.65 lb/d≤ 45.5 lb/d1701%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average30 mg/L≤ 10 mg/L200%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average450.36 lb/d≤ 30.4 lb/d1381%
April 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average52 mg/L≤ 15 mg/L247%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average12 mg/L≤ 10 mg/L20%
May 2026BOD, carbonaceous [5 day, 20 C], monthly average40.63 lb/d≤ 30.4 lb/d34%
August 2026BOD, carbonaceous [5 day, 20 C], monthly average10.5 mg/L≤ 10 mg/L5%

Limits in force (55)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitaveragereport only (deg F)May–Oct
Temperature, water deg. fahrenheitaveragereport only (deg F)Jan, Feb, Mar, Apr, Nov, Dec
Temperature, water deg. fahrenheitmaximumreport only (deg F)May–Oct
Temperature, water deg. fahrenheitmaximumreport only (deg F)Jan, Feb, Mar, Apr, Nov, Dec
Oxygen, dissolved [DO]instantaneous minimum≥ 7 mg/Lall year
pHminimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 91.1 lb/dall year
Solids, total suspendeddaily maximum≤ 136.6 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year
Oil & Greaseaveragereport only (mg/L)all year
Oil & Greasemaximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 2 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 9 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 3 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 13.5 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 6.1 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 27.3 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 9.1 lb/dMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 41 lb/dJan, Feb, Mar, Apr, Nov, Dec
Phosphorus, total [as P]averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]maximumreport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .011 mg/Lall year
Chlorine, total residualdaily maximum≤ .019 mg/Lall year
E. coli30-day geometric mean≤ 130 #/100mLall year
E. coli7-day geometric mean≤ 240 #/100mLall year
Nitrogen, Kjeldahl Totalaveragereport only (mg/L)all year
Nitrogen, Kjeldahl Totalmaximumreport only (mg/L)all year
Nitrite Plus Nitrate Totalaveragereport only (mg/L)all year
Nitrite Plus Nitrate Totalmaximumreport only (mg/L)all year
Solids, total dissolved [TDS]averagereport only (mg/L)all year
Solids, total dissolved [TDS]maximumreport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 30.4 lb/dall year
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 45.5 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]maximum weekly averagereport only (mg/L)all year
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Kentucky'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/KY0023868 · MCP: https://passage-data.com/mcp