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Henry County Water Authority

Sewage treatment plant, major discharger, Mcdonough, Georgia. NPDES permit GA0050241, in force until Apr 30, 2027. Last 12 months: over a limit 2 times (last October 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 46 days after each period: form 01 monthly (44 values)
Renewal application due
Nov 1, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], weekly average< 2.82 mg/L≤ 1.5 mg/L88%
October 2025Nitrogen, ammonia total [as N], weekly average< 38.14 lb/d≤ 31.3 lb/d22%

Limits in force (44)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 5 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 7.5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 125 lb/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 156 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspendedweekly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 250 lb/dall year
Solids, total suspendedweekly average≤ 313 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedweekly averagereport only (lb/d)all year
Nitrogen, organic total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 25 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ 31.3 lb/dall year
Nitrogen, nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly average≤ .3 mg/Lall year
Phosphorus, total [as P]weekly average≤ .45 mg/Lall year
Phosphorus, total [as P]monthly average≤ 7.5 lb/dall year
Phosphorus, total [as P]weekly average≤ 9.4 lb/dall year
Zinc, total recoverablemonthly averagereport only (ug/L)all year
Phosphate, ortho [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ 3 MGDall year
Flow, in conduit or thru treatment plantweekly average≤ 3.75 MGDall year
Chlorine, total residualdaily maximum≤ .02 mg/Lall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generalweekly geometric mean≤ 400 #/100mLall year
Solids, sludge, total, dry weightmonthly totalreport only (dry ton)all year
BOD, 5-day, percent removalminimum≥ 85 %all year
Solids, suspended percent removalminimum≥ 85 %all year
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimumreport only (%)all year
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimumreport only (%)all year

How strict are these limits?

Cited limits by parameter: Georgia'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/GA0050241 · MCP: https://passage-data.com/mcp