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Louisville and Jefferson County MSD

Sewage treatment plant, Hillview, Kentucky. NPDES permit KY0034177, in force until Feb 28, 2031. Last 12 months: over a limit 6 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 1 monthly (20 values), form 4 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
11 values over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
November 2025BOD, carbonaceous [5 day, 20 C], maximum weekly average47 mg/L≤ 22.5 mg/L109%
November 2025E. coli, 30-day geometric mean142.1 #/100mL≤ 130 #/100mL9%
November 2025E. coli, 7-day geometric mean1533 #/100mL≤ 240 #/100mL539%
February 2026Solids, total suspended, monthly average33 mg/L≤ 30 mg/L10%
February 2026Solids, total suspended, maximum weekly average81 mg/L≤ 45 mg/L80%
March 2026Nitrogen, ammonia total [as N], daily maximum17.4 mg/L≤ 15 mg/L16%

Limits in force (24)

ParameterStatisticLimitMonths
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
Oil & Greasemonthly averagereport only (mg/L)all year
Oil & Greasedaily 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
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]rolling average≤ 3.71 lb/dall year
Phosphorus, total [as P]daily maximumreport only (lb/d)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
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

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/KY0034177 · MCP: https://passage-data.com/mcp