CENTRAL IOWA WATER WORKS (DMWW)

NPDES permit IA0079847 · Minor NON-POTW · administratively continued, expires 2025-05-31 · 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.

This permit expired on 2025-05-31 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 (16)

OutfallParameterStatisticLimitMonths
001pHDAILY MN >= 6.3 SU all year
001pHDAILY MX <= 9 SU all year
001Solids, total suspended30DA AVG <= 30 mg/L all year
001Solids, total suspendedDAILY MX <= 45 mg/L all year
001Solids, total suspended30DA AVG <= 586 lb/d all year
001Solids, total suspendedDAILY MX <= 879 lb/d all year
001Nitrogen, nitrate total [as N]30DA AVG <= 1457.3 lb/d all year
001Nitrogen, nitrate total [as N]DAILY MX <= 1460.27 lb/d all year
001Iron, total [as Fe]30DA AVG <= 1.87 mg/L all year
001Iron, total [as Fe]DAILY MX <= 1.87 mg/L all year
001Iron, total [as Fe]30DA AVG <= 50.8 lb/d all year
001Iron, total [as Fe]DAILY MX <= 50.8 lb/d all year
001Aluminum, total [as Al]30DA AVG <= .773 mg/L all year
001Aluminum, total [as Al]DAILY MX <= 1.295 mg/L all year
001Aluminum, total [as Al]30DA AVG <= 19.058 lb/d all year
001Aluminum, total [as Al]DAILY MX <= 36.726 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