ROCKPORT NORTH WWTP

NPDES permit IN0061662 · Minor POTW · effective, expires 2031-03-31 · 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

8values over a limit
0required values missing, on 0 form(s)
0of 12 forms filed late

Last period with anything received: 2026-07-31. Most often over: Nitrogen, ammonia total [as N] (5), Solids, total suspended (2), Phosphorus, total [as P] (1).

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 (53)

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 all year
001Solids, total suspendedMX WK AV <= 45 mg/L all year
001Solids, total suspendedMO AVG <= 75 lb/d all year
001Solids, total suspendedMX WK AV <= 113 lb/d all year
001Nitrogen, ammonia total [as N]MO AVG <= 1.3 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 1.9 mg/L Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 1.9 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX WK AV <= 2.9 mg/L Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 3.3 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 4.8 lb/d Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 4.8 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX WK AV <= 7.3 lb/d Jan, Feb, Mar, Apr, Dec
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 all year
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 40 mg/L all year
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 63 lb/d all year
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 100 lb/d all year
001Flow, totalMO TOTAL report only all year
002Oxygen, dissolved [DO]DAILY MN >= 6 mg/L all year
002pHDAILY MN >= 6 SU all year
002pHDAILY MX <= 9 SU all year
002Solids, total suspendedMO AVG <= 12 mg/L all year
002Solids, total suspendedMX WK AV <= 18 mg/L all year
002Solids, total suspendedMO AVG <= 120 lb/d all year
002Solids, total suspendedMX WK AV <= 190 lb/d all year
002Nitrogen, total [as N]MO AVG report only all year
002Nitrogen, total [as N]MO AVG report only all year
002Nitrogen, ammonia total [as N]MO AVG <= 1.1 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
002Nitrogen, ammonia total [as N]MO AVG <= 1.6 mg/L Jan, Feb, Mar, Apr, Dec
002Nitrogen, ammonia total [as N]MX WK AV <= 1.6 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
002Nitrogen, ammonia total [as N]MX WK AV <= 2.4 mg/L Jan, Feb, Mar, Apr, Dec
002Nitrogen, ammonia total [as N]MO AVG <= 11 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
002Nitrogen, ammonia total [as N]MO AVG <= 17 lb/d Jan, Feb, Mar, Apr, Dec
002Nitrogen, ammonia total [as N]MX WK AV <= 17 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
002Nitrogen, ammonia total [as N]MX WK AV <= 25 lb/d Jan, Feb, Mar, Apr, Dec
002Phosphorus, total [as P]MO AVG <= 1 mg/L all year
002Phosphorus, total [as P]MO AVG report only all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002E. coli, colony forming units [CFU]MO GEO <= 125 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
002E. coli, colony forming units [CFU]DAILY MX <= 235 CFU/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
002Mercury, total recoverableDAILY MX report only Feb, Apr, Jun, Aug, Oct, Dec
002Mercury, total recoverableDAILY MX report only Feb, Apr, Jun, Aug, Oct, Dec
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L all year
002BOD, carbonaceous [5 day, 20 C]MX WK AV <= 15 mg/L all year
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 100 lb/d all year
002BOD, carbonaceous [5 day, 20 C]MX WK AV <= 160 lb/d all year
002Flow, 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