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NB Hiway LLC

Sewerage Systems, Leesburg, Virginia. NPDES permit VA0074942, in force until Nov 30, 2028. Last 12 months: over a limit 2 times (last January 2026), 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form M1 monthly (19 values), form A1 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
31 values over a limit, 11 required values missing, 2 of 13 reports late

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

Period endingParameterReportedLimitOver by
November 2025Nitrogen, ammonia total [as N], weekly average6.9≤ 3.1 mg/L123%
January 2026Nitrogen, ammonia total [as N], weekly average7.7≤ 3.1 mg/L148%

Limits in force (27)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 25 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 38 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 1.1 kg/dall year
BOD, 5-day, 20 deg. Cweekly average≤ 1.7 kg/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 25 mg/Lall year
Solids, total suspendedweekly average≤ 38 mg/Lall year
Solids, total suspendedmonthly average≤ 1.1 kg/dall year
Solids, total suspendedweekly average≤ 1.7 kg/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, total [as N]annual averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 2.1 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 3.1 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 2.1 mg/LMay–Oct
Nitrogen, ammonia total [as N]weekly average≤ 3.1 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, Kjeldahl, total [as N]annual averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]annual averagereport only (mg/L)all year
Phosphorus, total [as P]annual averagereport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly average≤ .012 MGD (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmaximumreport only (MGD) (alert, not enforceable)all year
Chlorine, total residualmonthly average≤ .008 mg/Lall year
Chlorine, total residualweekly average≤ .01 mg/Lall year
Chlorine, total residualminimum≥ .6 mg/Lall year
E. colimonthly average≤ 126 #/100mLall year

How strict are these limits?

Cited limits by parameter: Virginia's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/VA0074942 · MCP: https://passage-data.com/mcp