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Water system · PWSID IA7727031

DES MOINES WATER WORKS

DES MOINES, IA · ~246,055 people served

Check your exact address → DES MOINES overview
100
Excellent
PurityRadar safety score

PWSID

IA7727031

State

Iowa

City

DES MOINES

Population served

246,055

Primary source

SWP

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Nov 2023). Levels in parts per trillion (ppt).

Lithium

24,000 ppt

limit —

No federal limit

Violations & enforcement

8

Violations on record

0

Unaddressed

6

Health-based

32

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2019. Official EPA record →

Treatment technique · EPA contaminant 0200 health-based began May 2017 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2014 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2014 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2014 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2014 Resolved
Treatment technique · EPA contaminant 0300 health-based began Dec 2013 Resolved
Monitoring & reporting · Nitrate began Oct 1989 Resolved
Monitoring & reporting · Nitrate began Jul 1989 Resolved

Recent enforcement actions

  • State action · SIF Jun 2019
  • State action · SIE Dec 2018
  • State action · SFJ Dec 2018
  • State action · SOX Jun 2017
  • State action · SIF Jun 2017
  • State action · SFJ May 2017
  • State action · SIE May 2017
  • State action · SOX Feb 2015

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

71 stations · latest May 2026

1 · max 50 mg/L · 4,612

Fluoride

25 stations · latest Sep 2025

0.23 · max 1.25 mg/L · 118

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system IA7727031 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.