LOWELL WASTEWATER TREATMENT PLANT

NPDES permit IN0023621 · Major POTW · effective, expires 2030-12-31 · 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

3values over a limit
5required values missing, on 5 form(s)
7of 33 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (3).

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 (51)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DLYAVMIN >= 6 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Oxygen, dissolved [DO]DLYAVMIN >= 5 mg/L Jan, Feb, Mar, Apr, Dec
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 30 mg/L Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMO AVG <= 18 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMX WK AV <= 45 mg/L Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMX WK AV <= 27 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMO AVG <= 1001.4 lb/d Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMO AVG <= 600.8 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMX WK AV <= 1502.1 lb/d Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMX WK AV <= 901.3 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.6 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 1.8 mg/L Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 2.4 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX WK AV <= 2.7 mg/L Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 53.4 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 60.1 lb/d Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 80.1 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX WK AV <= 90.1 lb/d Jan, Feb, Mar, Apr, Dec
001Phosphorus, total [as P]MO AVG <= 1 mg/L all year
001Phosphorus, total [as P]MO AVG report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001E. coli, colony forming units [CFU]MO GEO <= 125 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001E. coli, colony forming units [CFU]DAILY MX <= 235 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 25 mg/L Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 15 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 22.5 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 834.5 lb/d Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 500.7 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 1335.2 lb/d Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 751.1 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Flow, totalMO TOTAL report only all year
004DurationMO TOTAL report only all year
004Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
004Precipitation, monthly accumulationMO TOTAL report only all year
004Discharge event observation [Visual Monitoring]MO TOTAL report only all year
102pHDAILY MN report only all year
102pHDAILY MX report only all year
102Solids, total suspendedMO AVG report only all year
102Solids, total suspendedDAILY MX report only all year
102Flow, in conduit or thru treatment plantMO AVG report only all year
102Flow, in conduit or thru treatment plantDAILY MX report only all year
102E. coli, colony forming units [CFU]MO GEO <= 125 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
102E. coli, colony forming units [CFU]DAILY MX <= 235 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
102BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
102BOD, carbonaceous [5 day, 20 C]DAILY MX report only all year
102Flow, 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