Missouri-American Water Company

NPDES permit MO0138517 · Minor NON-POTW · administratively continued, expires 2025-06-30 · 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 2025-06-30 and is administratively continued: 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

0values over a limit
0required values missing, on 0 form(s)
0of 4 forms filed late

Last period with anything received: 2026-06-30.

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 (28)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CWKLY AVG <= 15 mg/L all year
001BOD, 5-day, 20 deg. CMO AVG <= 10 mg/L all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspendedWKLY AVG <= 20 mg/L all year
001Solids, total suspendedMO AVG <= 15 mg/L all year
001Oil and grease [soxhlet extr.] tot.DAILY MX <= 15 mg/L all year
001Oil and grease [soxhlet extr.] tot.MO AVG <= 10 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX report only Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]DAILY MX <= 10.1 mg/L Apr, May, Jun
001Nitrogen, ammonia total [as N]DAILY MX <= 8.4 mg/L Jul, Aug, Sep
001Nitrogen, ammonia total [as N]MO AVG report only Jan, Feb, Mar, Oct, Nov, Dec
001Nitrogen, ammonia total [as N]MO AVG <= 1.5 mg/L Apr, May, Jun
001Nitrogen, ammonia total [as N]MO AVG <= 1 mg/L Jul, Aug, Sep
001Iron, total recoverableDAILY MX <= 1625.9 ug/L all year
001Iron, total recoverableMO AVG <= 824.6 ug/L all year
001Zinc, total recoverableDAILY MX <= 223.3 ug/L all year
001Zinc, total recoverableMO AVG <= 113.1 ug/L all year
001Aluminum, total recoverableDAILY MX report only all year
001Aluminum, total recoverableMO AVG report only all year
001Copper, total recoverableDAILY MX <= 26.8 ug/L all year
001Copper, total recoverableMO AVG <= 14.9 ug/L all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Chlorine, total residualDAILY MX <= 18 ug/L all year
001Chlorine, total residualMO AVG <= 9 ug/L all year
001E. coliDAILY MX <= 126 #/100mL all year
001E. coliMO 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