Passage Data · Check a report · Use it from your AI

Hyden STP

Sewage treatment plant, Hyden, Kentucky. NPDES permit KY0021245 expired Aug 31, 2025; its limits still apply. Last 12 months: over a limit 17 times (last August 2026), 35 required values missing, 12 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 1 monthly (35 values), form 4 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
31 values over a limit, 0 required values missing, 11 of 13 reports late

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

All 17 values over a limit
Period endingParameterReportedLimitOver by
November 2025E. coli, 7-day geometric mean461 #/100mL≤ 240 #/100mL92%
November 2025E. coli, 7-day geometric mean461 #/100mL≤ 240 #/100mL92%
December 2025E. coli, 30-day geometric mean183 #/100mL≤ 130 #/100mL41%
December 2025E. coli, 7-day geometric mean1733 #/100mL≤ 240 #/100mL622%
January 2026E. coli, 30-day geometric mean323 #/100mL≤ 130 #/100mL148%
January 2026E. coli, 7-day geometric mean1553 #/100mL≤ 240 #/100mL547%
February 2026E. coli, 7-day geometric mean344 #/100mL≤ 240 #/100mL43%
February 2026Solids, suspended percent removal, monthly average minimum80 %≥ 85 %33%
February 2026Solids, total suspended, maximum weekly average60 mg/L≤ 45 mg/L33%
March 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average25 mg/L≤ 22.5 mg/L11%
March 2026Oxygen, dissolved [DO], instantaneous minimum6 mg/L≥ 7 mg/L14%
April 2026BOD, carbonaceous [5 day, 20 C], maximum weekly average25 mg/L≤ 22.5 mg/L11%
April 2026E. coli, 30-day geometric mean231 #/100mL≤ 130 #/100mL78%
April 2026E. coli, 7-day geometric mean1986 #/100mL≤ 240 #/100mL728%
May 2026Oxygen, dissolved [DO], instantaneous minimum3.6 mg/L≥ 7 mg/L49%
July 2026E. coli, 7-day geometric mean1300 #/100mL≤ 240 #/100mL442%
August 2026E. coli, 7-day geometric mean2420 #/100mL≤ 240 #/100mL908%

Limits in force (53)

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
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 50 lb/dall year
Solids, total suspendedmaximum weekly average≤ 75.1 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≤ 4 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 6 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 6.68 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 16.7 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 10.02 lb/dMay–Oct
Nitrogen, ammonia total [as N]maximum weekly average≤ 25.05 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
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≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 22.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 lb/dall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 37.5 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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/KY0021245 · MCP: https://passage-data.com/mcp