Town of OXFORD WWTP

NPDES permit MD0022543 · 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
1required values missing, on 1 form(s)
2of 13 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (55)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]INST MIN >= 6 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 15 mg/L all year
001BOD, 5-day, 20 deg. CMX WK AV <= 22 mg/L all year
001BOD, 5-day, 20 deg. CMX MO AV <= 19 lb/d all year
001BOD, 5-day, 20 deg. CMX WK AV <= 28 lb/d all year
001BOD, 5-day, 20 deg. CMY report only all year
001BOD, 5-day, 20 deg. CANNL MAX <= 9638 lb/yr all year
001BOD, 5-day, 20 deg. CTC <= 781 lb/mo May, Jun, Jul, Aug, Sep, Oct
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 8.5 SU all year
001Solids, total suspendedMX MO AV <= 30 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMX WK AV <= 45 mg/L May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMX MO AV <= 38 lb/d May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedANNL MAX <= 19004 lb/yr all year
001Solids, total suspendedMX WK AV <= 56 lb/d May, Jun, Jul, Aug, Sep, Oct
001Solids, total suspendedMY report only all year
001Solids, total suspendedTC report only May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]TC <= 468 lb/mo May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, total [as N]ANNL MAX <= 5621 lb/yr 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]MY report only all year
001Nitrogen, organic total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MX MO AV <= 2.8 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV <= 5.8 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 7.6 mg/L May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX WK AV <= 12.4 mg/L Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX MO AV <= 3.5 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX MO AV <= 7.3 lb/d Jan, Feb, Mar, Apr, Nov, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 9.5 lb/d May, Jun, Jul, Aug, Sep, Oct
001Nitrogen, ammonia total [as N]MX WK AV <= 15.5 lb/d Jan, Feb, Mar, Apr, Nov, Dec
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 MAX <= 624 lb/yr all year
001Phosphorus, total [as P]TC <= 52 lb/mo May, Jun, Jul, Aug, Sep, Oct
001Phosphorus, total [as P]ANNL TOT report only all year
001Phosphorus, total [as P]ANNL TOT report only all year
001Phosphorus, total [as P]MY report only 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 <= .049 mg/L all year
001Coliform, fecal generalMO MED <= 14 MPN/100mL all year
001BOD, 5-day, percent removalMO AV MN >= 85 % all year
001Solids, suspended percent removalMO AV MN >= 85 % all year
001Flow, totalMO TOTAL report only all year
001Flow, totalANNL TOT report only all year
001Flow, totalANNL TOT report only all year
101BOD, 5-day, 20 deg. CMO AVG report only all year
101BOD, 5-day, 20 deg. CMO AVG report only all year
101Solids, total suspendedMO AVG report only all year
101Solids, total suspendedMO AVG report only all year
102Coliform, fecal generalMO AVG report only all year
102Coliform, fecal generalMO AVG 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