Loudoun County Sanitation Authority

NPDES permit VA0060500 · Minor POTW · effective, expires 2031-02-28 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
2required values missing, on 1 form(s)
0of 14 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 10 days after each monitoring period ends (the most common figure among VA permits in EPA's filings — check your permit).

Limits in force (23)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]MINIMUM >= 6.8 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 24 mg/L all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 36 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 5.3 kg/d all year
001BOD, 5-day, 20 deg. CWKLY AVG <= 7.9 kg/d all year
001BOD, 5-day, 20 deg. CMO AVG report only all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedWKLY AVG <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 6.6 kg/d all year
001Solids, total suspendedWKLY AVG <= 9.9 kg/d all year
001Solids, total suspendedMO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, May, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 12 mg/L Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]WKLY AVG <= 18 mg/L Jun, Jul, Aug, Sep, Oct, Nov
001Flow, in conduit or thru treatment plantMO AVG <= .058 MGD (alert) all year
001Flow, in conduit or thru treatment plantMAXIMUM report only (alert) all year
001Chlorine, total residualMO AVG <= .017 mg/L all year
001Chlorine, total residualWKLY AVG <= .019 mg/L all year
001BOD, percent removal [total]MO AV MN >= 85 % all year
001E. coliMO AVG <= 126 #/100mL all year
001Solids, suspended percent removalMO AV MN >= 85 % all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states