MISSOURI WEST WATER SYSTEM

MANDAN, ND · ~4,303 people served

Check your exact address → MANDAN overview

100

Excellent

PurityRadar safety score

PWSID

ND3001431

State

North Dakota

City

MANDAN

Population served

4,303

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 Dec 2024). Levels in parts per trillion (ppt).

Lithium

45,000 ppt

limit —

No federal limit

Violations & enforcement

No violations are on record for this system in EPA’s SDWIS/ECHO data.

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

Fluoride

8 stations · latest May 2025

0.327 · max 0.708 mg/L · 157

Manganese

8 stations · latest Apr 2025

0.042 · max 0.383 mg/L · 135

Copper

5 stations · latest Apr 2025

6.93 · max 23.4 ug/L · 60

Arsenic

5 stations · latest Oct 2023

5.7 · max 9.3 ug/l · 19

Lead

3 stations · latest Apr 2025

2.89 · max 6.67 ug/L · 5

Nitrate

1 station · latest Jun 2023

0.042 · max 0.042 mg/L · 1

Uranium

1 station · latest May 2023

1.42 · max 1.42 ug/l · 1

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 ND3001431 — 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.