Aberdeen Proving Ground, Aberdeen Area WWTP

NPDES permit MD0021237 · Major FEDERAL · effective, expires 2027-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

5values over a limit
0required values missing, on 0 form(s)
0of 34 forms filed late

Last period with anything received: 2026-07-31. Most often over: BOD, 5-day, 20 deg. C (5).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MD permits in EPA's filings — check your permit).

Limits in force (64)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 5 mg/L all year
001Oxygen, dissolved [DO]MH >= 6 mg/L Feb, Mar, Apr, May
001BOD, 5-day, 20 deg. CMX MO AV <= 20 mg/L all year
001BOD, 5-day, 20 deg. CMX WK AV <= 30 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 280 lb/d all year
001BOD, 5-day, 20 deg. CMX WK AV <= 430 lb/d all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMX MO AV <= 20 mg/L all year
001Solids, total suspendedMX WK AV <= 30 mg/L all year
001Solids, total suspendedMX MO AV <= 280 lb/d all year
001Solids, total suspendedMX WK AV <= 430 lb/d all year
001Solids, total suspendedCUM TOTL <= 103500 lb/yr all year
001Solids, total suspendedMO TOTAL report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]ANNL TOT report only all year
001Nitrogen, total [as N]ANNL TOT report only all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrogen, total [as N]CUM TOTL <= 20710 lb/yr all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MX MO AV <= 2.9 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV <= 5.3 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX DA AV <= 7 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX DA AV <= 8.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 40 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV <= 75 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX DA AV <= 99 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX DA AV <= 120 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, Kjeldahl, total [as N]MO AVG report only all year
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]ANNL TOT report only all year
001Phosphorus, total [as P]ANNL TOT report only all year
001Phosphorus, total [as P]CUM TOTL <= 1553 lb/yr all year
001Phosphorus, total [as P]MO TOTAL report only all year
001Cyanide, total [as CN]QRTR AVG report only Mar, Jun, Sep, Dec
001PCB, total, scan effluentQRTR AVG report only Mar, Jun, Sep, Dec
001Phosphate, ortho [as P]MO AVG report only all year
001BenzidineQRTR AVG report only Mar, Jun, Sep, Dec
0014,4'-DDTQRTR AVG report only Mar, Jun, Sep, Dec
001DieldrinQRTR AVG report only Mar, Jun, Sep, Dec
001EndrinQRTR AVG report only Mar, Jun, Sep, Dec
001ToxapheneQRTR AVG report only Mar, Jun, Sep, Dec
001HeptachlorQRTR AVG report only Mar, Jun, Sep, Dec
001Heptachlor epoxideQRTR AVG report only Mar, Jun, Sep, Dec
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualMAXIMUM <= .1 mg/L all year
001ChlordaneQRTR AVG report only Mar, Jun, Sep, Dec
001Coliform, fecal generalMO MED <= 14 MPN/100mL all year
001BOD, 5-day, percent removalMO AVG report only all year
001Solids, suspended percent removalMO AVG report only all year
001Flow, totalANNL TOT report only all year
001Flow, totalANNL TOT report only all year
001Flow, totalMO TOTAL report only all year
101BOD, 5-day, 20 deg. CMO AVG report only all year
101Solids, total suspendedMO AVG report only all year
TRADSolids, total suspendedCUM TOTL report only all year
TRADSolids, total suspendedCUM TOTL report only all year
TRADNitrogen, total [as N]CUM TOTL report only all year
TRADNitrogen, total [as N]CUM TOTL report only all year
TRADPhosphorus, total [as P]CUM TOTL report only all year
TRADPhosphorus, total [as P]CUM TOTL report only all year
TRADFlowYA report only 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