MERIDIAN POTW

NPDES permit MS0020117 · Major POTW · effective, expires 2030-10-31 · 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

10values over a limit
4required values missing, on 2 form(s)
12of 33 forms filed late

Last period with anything received: 2026-07-31. Most often over: Copper, total recoverable (4), Solids, total suspended (3), Solids, suspended percent removal (2).

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 (144)

OutfallParameterStatisticLimitMonths
002Oxygen, dissolved [DO]MINIMUM >= 6 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedMO AVG <= 3253 lb/d all year
002Solids, total suspendedMX WK AV <= 4879 lb/d all year
002Nitrogen, total [as N]MO AVG report only all year
002Nitrogen, total [as N]MX WK AV report only all year
002Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
002Nitrogen, ammonia total [as N]MO AVG <= 2 mg/L Jan, Feb, Mar, Apr, Dec
002Nitrogen, ammonia total [as N]MX WK AV <= 1.5 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
002Nitrogen, ammonia total [as N]MX MO AV <= 3 mg/L Jan, Feb, Mar, Apr, Dec
002Nitrogen, ammonia total [as N]MO AVG <= 108 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
002Nitrogen, ammonia total [as N]MO AVG <= 217 lb/d Jan, Feb, Mar, Apr, Dec
002Nitrogen, ammonia total [as N]MX WK AV <= 163 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
002Nitrogen, ammonia total [as N]MX WK AV <= 325 lb/d Jan, Feb, Mar, Apr, Dec
002Phosphorus, total [as P]MO AVG report only all year
002Phosphorus, total [as P]MX WK AV report only all year
002Copper, total recoverableMO AVG <= .011 mg/L all year
002Copper, total recoverableMX WK AV <= .012 mg/L all year
002Flow, in conduit or thru treatment plantMO AVG <= 13 MGD all year
002Flow, in conduit or thru treatment plantMX WK AV report only all year
002Chlorine, total residualMO AVG <= .011 mg/L all year
002Chlorine, total residualMX WK AV <= .019 mg/L all year
002E. coliMO AVG <= 126 #/100mL all year
002E. coliMX WK AV <= 410 #/100mL all year
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 7 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L Jan, Feb, Mar, Apr, Dec
002BOD, carbonaceous [5 day, 20 C]MX WK AV <= 10.5 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
002BOD, carbonaceous [5 day, 20 C]MX WK AV <= 15 mg/L Jan, Feb, Mar, Apr, Dec
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 1084 lb/d Jan, Feb, Mar, Apr, Dec
002BOD, carbonaceous [5 day, 20 C]MO AVG <= 759 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
002BOD, carbonaceous [5 day, 20 C]MX WK AV <= 1627 lb/d Jan, Feb, Mar, Apr, Dec
002BOD, carbonaceous [5 day, 20 C]MX WK AV <= 1138 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
002%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMINIMUM >= 89.74 % all year
002%Effect Static Renewal 7Day Chronic Pimephales promelasMINIMUM >= 89.74 % all year
101Oxygen, dissolved [DO]MINIMUM report only all year
101Oxygen, dissolved [DO]MAXIMUM report only all year
101pHMINIMUM report only all year
101pHMAXIMUM report only all year
101Solids, total suspendedMO AVG <= 30 mg/L all year
101Solids, total suspendedMX WK AV <= 45 mg/L all year
101Solids, total suspendedMO AVG report only all year
101Solids, total suspendedMX WK AV report only all year
101Solids, total suspendedMO AVG report only all year
101Solids, total suspendedMX WK AV report only all year
101Solids, total suspendedMO AVG report only all year
101Solids, total suspendedMX WK AV report only all year
101Nitrogen, total [as N]MO AVG report only all year
101Nitrogen, total [as N]MX WK AV report only all year
101Nitrogen, total [as N]MO TOTAL report only all year
101Nitrogen, total [as N]MX WK AV report only all year
101Nitrogen, total [as N]MO AVG report only all year
101Nitrogen, total [as N]MX WK AV report only all year
101Nitrogen, total [as N]MO TOTAL report only all year
101Nitrogen, ammonia total [as N]MO AVG <= 2 mg/L Jan, Feb, Mar, Apr, Dec
101Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
101Nitrogen, ammonia total [as N]MX WK AV <= 3 mg/L Jan, Feb, Mar, Apr, Dec
101Nitrogen, ammonia total [as N]MX WK AV <= 1.5 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
101Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, Dec
101Nitrogen, ammonia total [as N]MO AVG report only May, Jun, Jul, Aug, Sep, Oct, Nov
101Nitrogen, ammonia total [as N]MX WK AV report only Jan, Feb, Mar, Apr, Dec
101Nitrogen, ammonia total [as N]MX WK AV report only May, Jun, Jul, Aug, Sep, Oct, Nov
101Nitrogen, ammonia total [as N]MO AVG report only all year
101Nitrogen, ammonia total [as N]MX WK AV report only all year
101Nitrogen, ammonia total [as N]MO AVG report only all year
101Nitrogen, ammonia total [as N]MX WK AV report only all year
101Phosphorus, total [as P]MO AVG report only all year
101Phosphorus, total [as P]MX WK AV report only all year
101Phosphorus, total [as P]MO TOTAL report only all year
101Phosphorus, total [as P]MO AVG report only all year
101Phosphorus, total [as P]MX WK AV report only all year
101Phosphorus, total [as P]MO TOTAL report only all year
101Copper, total recoverableMO AVG report only all year
101Copper, total recoverableMX WK AV report only all year
101Flow, in conduit or thru treatment plantMO AVG <= 13 MGD all year
101Flow, in conduit or thru treatment plantMX WK AV report only all year
101Chlorine, total residualMINIMUM >= .3 mg/L all year
101BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L Jan, Feb, Mar, Apr, Dec
101BOD, carbonaceous [5 day, 20 C]MO AVG <= 7 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
101BOD, carbonaceous [5 day, 20 C]MX WK AV <= 15 mg/L Jan, Feb, Mar, Apr, Dec
101BOD, carbonaceous [5 day, 20 C]MX WK AV <= 10.5 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
101BOD, carbonaceous [5 day, 20 C]MO AVG report only Jan, Feb, Mar, Apr, Dec
101BOD, carbonaceous [5 day, 20 C]MO AVG report only May, Jun, Jul, Aug, Sep, Oct, Nov
101BOD, carbonaceous [5 day, 20 C]MX WK AV report only Jan, Feb, Mar, Apr, Dec
101BOD, carbonaceous [5 day, 20 C]MX WK AV report only May, Jun, Jul, Aug, Sep, Oct, Nov
101BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
101BOD, carbonaceous [5 day, 20 C]MX WK AV report only all year
101BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
101BOD, carbonaceous [5 day, 20 C]MX WK AV report only all year
101BOD, carb-5 day, 20 deg C, percent removalMINIMUM >= 85 % all year
101Solids, suspended percent removalMINIMUM >= 85 % all year
101Sludge settleability 30 minuteMINIMUM report only all year
101Sludge settleability 30 minuteMAXIMUM report only all year
201Oxygen, dissolved [DO]MINIMUM report only all year
201Oxygen, dissolved [DO]MAXIMUM report only all year
201pHMINIMUM report only all year
201pHMAXIMUM report only all year
201Solids, total suspendedMO AVG <= 30 mg/L all year
201Solids, total suspendedMX WK AV <= 45 mg/L all year
201Solids, total suspendedMO AVG report only all year
201Solids, total suspendedMX WK AV report only all year
201Solids, total suspendedMO AVG report only all year
201Solids, total suspendedMX WK AV report only all year
201Solids, total suspendedMO AVG report only all year
201Solids, total suspendedMX WK AV report only all year
201Nitrogen, total [as N]MO AVG report only all year
201Nitrogen, total [as N]MX WK AV report only all year
201Nitrogen, total [as N]MO TOTAL report only all year
201Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
201Nitrogen, ammonia total [as N]MO AVG <= 2 mg/L Jan, Feb, Mar, Apr, Dec
201Nitrogen, ammonia total [as N]MX WK AV <= 1.5 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
201Nitrogen, ammonia total [as N]MX WK AV <= 3 mg/L Jan, Feb, Mar, Apr, Dec
201Nitrogen, ammonia total [as N]MO AVG report only May, Jun, Jul, Aug, Sep, Oct, Nov
201Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Apr, Dec
201Nitrogen, ammonia total [as N]MX WK AV report only May, Jun, Jul, Aug, Sep, Oct, Nov
201Nitrogen, ammonia total [as N]MX WK AV report only Jan, Feb, Mar, Apr, Dec
201Nitrogen, ammonia total [as N]MO AVG report only all year
201Nitrogen, ammonia total [as N]MX WK AV report only all year
201Nitrogen, ammonia total [as N]MO AVG report only all year
201Nitrogen, ammonia total [as N]MX WK AV report only all year
201Phosphorus, total [as P]MO AVG report only all year
201Phosphorus, total [as P]MX WK AV report only all year
201Phosphorus, total [as P]MO TOTAL report only all year
201Phosphorus, total [as P]MO AVG report only all year
201Phosphorus, total [as P]MX WK AV report only all year
201Phosphorus, total [as P]MO TOTAL report only all year
201Flow, in conduit or thru treatment plantMO AVG <= 1 MGD all year
201Flow, in conduit or thru treatment plantMX WK AV report only all year
201BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L Jan, Feb, Mar, Apr, Dec
201BOD, carbonaceous [5 day, 20 C]MO AVG <= 7 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
201BOD, carbonaceous [5 day, 20 C]MX WK AV <= 15 mg/L Jan, Feb, Mar, Apr, Dec
201BOD, carbonaceous [5 day, 20 C]MX WK AV <= 10.5 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
201BOD, carbonaceous [5 day, 20 C]MO AVG report only Jan, Feb, Mar, Apr, Dec
201BOD, carbonaceous [5 day, 20 C]MO AVG report only May, Jun, Jul, Aug, Sep, Oct, Nov
201BOD, carbonaceous [5 day, 20 C]MX WK AV report only Jan, Feb, Mar, Apr, Dec
201BOD, carbonaceous [5 day, 20 C]MX WK AV report only May, Jun, Jul, Aug, Sep, Oct, Nov
201BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
201BOD, carbonaceous [5 day, 20 C]MX WK AV report only all year
201BOD, carbonaceous [5 day, 20 C]MO AVG report only all year
201BOD, carbonaceous [5 day, 20 C]MX WK AV report only all year
201BOD, carb-5 day, 20 deg C, percent removalMINIMUM >= 85 % all year
201Solids, suspended percent removalMINIMUM >= 85 % all year
201Sludge settleability 30 minuteMINIMUM report only all year
201Sludge settleability 30 minuteMAXIMUM 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