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Hillsboro Town

Sewage treatment plant, Hillsboro, Virginia. NPDES permit VA0093114, in force until Jun 30, 2027. Last 12 months: over a limit 27 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (20 values), form A1 yearly
Renewal application due
Jan 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 13 reports late

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

All 27 values over a limit
Period endingParameterReportedLimitOver by
December 2025Nitrogen, Total As N, annual average29.38≤ 25.4 mg/L16%
February 2026BOD, 5-day, 20 deg. C, monthly average12≤ 10 mg/L20%
February 2026Nitrogen, ammonia total [as N], monthly average1.2≤ 1.1 mg/L9%
February 2026Nitrogen, ammonia total [as N], weekly average1.2≤ 1.1 mg/L9%
March 2026BOD, 5-day, 20 deg. C, monthly average18≤ 10 mg/L80%
March 2026BOD, 5-day, 20 deg. C, weekly average16≤ 15 mg/L7%
March 2026Nitrogen, ammonia total [as N], monthly average1.6≤ 1.1 mg/L45%
March 2026Nitrogen, ammonia total [as N], weekly average1.5≤ 1.1 mg/L36%
March 2026Solids, total suspended, monthly average12≤ 10 mg/L20%
April 2026BOD, 5-day, 20 deg. C, monthly average.3≤ .29 kg/d3%
April 2026BOD, 5-day, 20 deg. C, monthly average31≤ 10 mg/L210%
April 2026BOD, 5-day, 20 deg. C, weekly average36≤ 15 mg/L140%
April 2026E. coli, geometric mean> 9≤ 126 #/100mL—
April 2026Nitrogen, ammonia total [as N], monthly average2.6≤ 1.1 mg/L136%
April 2026Nitrogen, ammonia total [as N], weekly average3.3≤ 1.1 mg/L200%
April 2026Solids, total suspended, monthly average13.6≤ 10 mg/L36%
April 2026Solids, total suspended, weekly average15.1≤ 15 mg/L1%
May 2026BOD, 5-day, 20 deg. C, monthly average35≤ 10 mg/L250%
May 2026BOD, 5-day, 20 deg. C, weekly average35≤ 15 mg/L133%
May 2026Nitrogen, ammonia total [as N], monthly average1.7≤ 1.1 mg/L55%
May 2026Nitrogen, ammonia total [as N], weekly average1.7≤ 1.1 mg/L55%
May 2026Solids, total suspended, monthly average24≤ 10 mg/L140%
May 2026Solids, total suspended, weekly average24≤ 15 mg/L60%
June 2026BOD, 5-day, 20 deg. C, monthly average15≤ 10 mg/L50%
June 2026E. coli, geometric mean> 8≤ 126 #/100mL—
June 2026Solids, total suspended, monthly average17.3≤ 10 mg/L73%
June 2026Solids, total suspended, weekly average17.3≤ 15 mg/L15%

Limits in force (26)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ .29 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ .43 kg/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 10 mg/Lall year
Solids, total suspendedweekly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ .64 lb/dall year
Solids, total suspendedweekly average≤ .96 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 1.1 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 1.1 mg/Lall year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ .00764 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD) (alert, not enforceable)all year
BOD, percent removal [total]monthly average minimum≥ 85 %all year
E. coligeometric mean≤ 126 #/100mLall year
Nitrogen, Total As Nannual average≤ 25.4 mg/Lall year
Phosphorus, Total As Pannual average≤ 8.6 mg/Lall year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Virginia'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/VA0093114 · MCP: https://passage-data.com/mcp