RICHMOND WWTP

NPDES permit IN0025615 · Major 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

1values over a limit
0required values missing, on 0 form(s)
0of 51 forms filed late

Last period with anything received: 2026-07-31. Most often over: E. coli, colony forming units [CFU] (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 (87)

OutfallParameterStatisticLimitMonths
001Oxygen, dissolved [DO]DLYAVMIN >= 7 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Oxygen, dissolved [DO]DLYAVMIN >= 6 mg/L Jan, Feb, Mar, Apr, Dec
001pHDAILY MN >= 6 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspendedMO AVG <= 24 mg/L Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMO AVG <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMX WK AV <= 36 mg/L Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMX WK AV <= 15 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMO AVG <= 7206 lb/d Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMO AVG <= 3002 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Solids, total suspendedMX WK AV <= 10809 lb/d Jan, Feb, Mar, Apr, Dec
001Solids, total suspendedMX WK AV <= 4504 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 <= .9 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 1.4 mg/L Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 1.4 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX WK AV <= 2.1 mg/L Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 270 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MO AVG <= 420 lb/d Jan, Feb, Mar, Apr, Dec
001Nitrogen, ammonia total [as N]MX WK AV <= 420 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Nitrogen, ammonia total [as N]MX WK AV <= 631 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
001Cyanide, free [as free]DAILY MX report only Mar, Jun, Sep, Dec
001Cyanide, free [as free]DAILY MX report only Mar, Jun, Sep, Dec
001Cyanide, free [as free]DAILY MX report only Mar, Jun, Sep, Dec
001Cyanide, free [as free]DAILY MX report only Mar, Jun, Sep, Dec
001Nickel, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Nickel, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Nickel, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Nickel, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Zinc, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Zinc, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Zinc, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Zinc, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Lead, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Lead, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Lead, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Lead, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Chromium, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
001Copper, total recoverableMO AVG report only all year
001Copper, total recoverableDAILY MX report only all year
001Copper, total recoverableMO AVG report only all year
001Copper, total recoverableDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Chlorine, total residualMO AVG < .06 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
001Chlorine, total residualDAILY MX < .06 mg/L Apr, May, Jun, Jul, Aug, Sep, Oct
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
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute (alert) Feb, Aug
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute (alert) Mar, Sep
001Toxicity [acute], Ceriodaphnia dubiaMAXIMUM <= 1 tox acute (alert) Mar, Sep
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1 tox chronic (alert) Feb, Aug
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1 tox chronic (alert) Mar, Sep
001Toxicity [chronic], Ceriodaphnia dubiaMAXIMUM <= 1 tox chronic (alert) Mar, Sep
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute (alert) Feb, Aug
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute (alert) Mar, Sep
001Toxicity [acute], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox acute (alert) Mar, Sep
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox chronic (alert) Feb, Aug
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox chronic (alert) Mar, Sep
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MAXIMUM <= 1 tox chronic (alert) Mar, Sep
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 20 mg/L Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 10 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 30 mg/L Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 15 mg/L May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 6005 lb/d Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MO AVG <= 3002 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 9007 lb/d Jan, Feb, Mar, Apr, Dec
001BOD, carbonaceous [5 day, 20 C]MX WK AV <= 4504 lb/d May, Jun, Jul, Aug, Sep, Oct, Nov
001Phosphorus, total percent removalMO AV MN >= 80 % all year
001Flow, totalMO TOTAL report only all year
002DurationMO TOTAL report only all year
002Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
002Precipitation, monthly accumulationMO TOTAL report only all year
002Discharge event observation [Visual Monitoring]MO 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
005DurationMO TOTAL report only all year
005Overflow volume [SS0 volume, CSO volume]MO TOTAL report only all year
005Precipitation, monthly accumulationMO TOTAL report only all year
005Discharge event observation [Visual Monitoring]MO TOTAL report only all year

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