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Naval Support Facility, Dahlgr

Federal facility (Sewerage Systems), Dahlgren, Virginia. NPDES permit VA0021067, in force until Aug 31, 2027. Last 12 months: no values over a limit, 2 of 14 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (19 values), form A1 yearly, form S1 twice a year
Renewal application due
Mar 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 17 reports late

Limits in force (27)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5.5 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly maximum≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 82 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 120 kg/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly maximum≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 82 kg/dall year
Solids, total suspendedweekly average≤ 120 kg/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≤ 5 mg/Lall year
Nitrogen, ammonia total [as N]weekly maximum≤ 5 mg/Lall 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≤ .72 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
Nitrogen, Total As Nannual average≤ 7 mg/Lall year
Phosphorus, Total As Pannual average≤ 2 mg/Lall year
Enterococcigeometric mean≤ 35 #/100mLall year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
TU Static Renewal 7-Day Chronic Americamysis bahia (formerly Mysidopsis bahia)maximumreport only (tox chronic)all year
TU Static Renewal 7-Day Chronic Cyprinodon variegatus maximumreport only (tox chronic)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/VA0021067 · MCP: https://passage-data.com/mcp