TRAPPE WWTP

NPDES permit MD0020486 · Minor POTW · expired, expires 2024-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2024-08-31 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

6values over a limit
0required values missing, on 0 form(s)
0of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Phosphorus, total [as P] (5), pH (1).

Reporting

Reports are due about 29 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (40)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 6 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 10 mg/L May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMX MO AV <= 30 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMX WK AV <= 15 mg/L May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMX WK AV <= 45 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMX MO AV <= 17 lb/d May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMX MO AV <= 50 lb/d Jan, Feb, Mar, Apr, Oct, Nov, Dec
001BOD, 5-day, 20 deg. CMX WK AV <= 25 lb/d May, Jun, Jul, Aug, Sep
001BOD, 5-day, 20 deg. CMX WK AV <= 75 lb/d Jan, Feb, Mar, Apr, Oct, Nov, Dec
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMX MO AV <= 30 mg/L all year
001Solids, total suspendedMX WK AV <= 45 mg/L all year
001Solids, total suspendedMX MO AV <= 50 lb/d all year
001Solids, total suspendedMX WK AV <= 75 lb/d all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO TOTAL report only all year
001Nitrogen, total [as N]ANNL MAX report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MX MO AV <= 1.3 mg/L May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MX MO AV <= 2.7 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MX DA AV <= 10.1 mg/L May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MX DA AV <= 10.1 mg/L Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 2.2 lb/d May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MX MO AV <= 4.5 lb/d Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MX DA AV <= 16.8 lb/d May, Jun, Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MX DA AV <= 16.8 lb/d Jan, Feb, Mar, Apr, Oct, Nov, Dec
001Nitrite + Nitrate total [as N]MO AVG report only all year
001Phosphorus, total [as P]MX MO AV <= .3 mg/L all year
001Phosphorus, total [as P]MX WK AV <= .45 mg/L all year
001Phosphorus, total [as P]MX MO AV <= .5 lb/d all year
001Phosphorus, total [as P]MO TOTAL report only all year
001Phosphorus, total [as P]MX WK AV <= .75 lb/d all year
001Phosphorus, total [as P]ANNL MAX <= 183 lb/yr all year
001Phosphate, ortho [as P]MO AVG report only all year
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
001Coliform, fecal generalMO MED <= 14 MPN/100mL all year
001Flow, totalMO TOTAL 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