DES MOINES WATER WORKS

NPDES permit IA0052975 · Minor NON-POTW · administratively continued, expires 2024-04-30 · 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 2024-04-30 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 12 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among IA permits in EPA's filings — check your permit).

Limits in force (11)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6.5 SU all year
001pHDAILY MX <= 9 SU all year
001Nitrogen, nitrate total [as N]DAILY MX <= 9.5 mg/L all year
001Cadmium, total [as Cd]30DA AVG <= .00045 mg/L all year
001Cadmium, total [as Cd]DAILY MX <= .0043 mg/L all year
001Cadmium, total [as Cd]30DA AVG <= .0019 lb/d all year
001Cadmium, total [as Cd]DAILY MX <= .018 lb/d all year
001Chlorine, total residual30DA AVG <= .011 mg/L all year
001Chlorine, total residualDAILY MX <= .019 mg/L all year
001Chlorine, total residual30DA AVG <= .046 lb/d all year
001Chlorine, total residualDAILY MX <= .079 lb/d 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