MISSOURI-AMERICAN WATER COMPANY

NPDES permit MO0039659 · Major POTW · expired, expires 2022-09-30 · 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.

This permit expired on 2022-09-30 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

2values over a limit
0required values missing, on 0 form(s)
0of 25 forms filed late

Last period with anything received: 2026-08-31. Most often over: E. coli (1), BOD, 5-day, 20 deg. C (1).

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MO permits in EPA's filings — check your permit).

Limits in force (40)

OutfallParameterStatisticLimitMonths
004BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
004BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspendedWKLY AVG <= 45 mg/L all year
004Solids, total suspendedMO AVG <= 30 mg/L all year
004Oil and grease [soxhlet extr.] tot.DAILY MX <= 15 mg/L all year
004Oil and grease [soxhlet extr.] tot.MO AVG <= 10 mg/L all year
004Nitrogen, total [as N]DAILY MX report only all year
004Nitrogen, total [as N]MO AVG report only all year
004Nitrogen, ammonia total [as N]DAILY MX report only all year
004Nitrogen, ammonia total [as N]MO AVG report only all year
004Phosphorus, total [as P]DAILY MX report only all year
004Phosphorus, total [as P]MO AVG report only all year
004Nickel, total recoverableDAILY MX report only all year
004Nickel, total recoverableMO AVG report only all year
004Zinc, total recoverableDAILY MX report only all year
004Zinc, total recoverableMO AVG report only all year
004Cadmium, total recoverableDAILY MX report only all year
004Cadmium, total recoverableMO AVG report only all year
004Lead, total recoverableDAILY MX report only all year
004Lead, total recoverableMO AVG report only all year
004Copper, total recoverableDAILY MX report only all year
004Copper, total recoverableMO AVG report only all year
004Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
004Chromium, hexavalent dissolved [as Cr]MO AVG report only all year
004Chromium, trivalent total recoverableDAILY MX report only all year
004Chromium, trivalent total recoverableMO AVG report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
004Flow, in conduit or thru treatment plantMO AVG report only all year
004E. coliDAILY MX <= 630 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
004E. coli30DA GM <= 126 #/100mL Apr, May, Jun, Jul, Aug, Sep, Oct
004Toxicity [acute], Ceriodaphnia dubiaDAILY MX report only all year
004Toxicity [acute], Pimephales promelas [Fathead Minnow]DAILY MX report only all year
SM1Nitrogen, total [as N]DAILY MX report only all year
SM1Nitrogen, total [as N]MO AVG report only all year
SM1Phosphorus, total [as P]DAILY MX report only all year
SM1Phosphorus, total [as P]MO AVG report only all year
SM2Hardness, total [as CaCO3]DAILY MX report only all year
SM2Hardness, total [as CaCO3]MO 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