Tap Water Results

Is Mandan, ND tap water safe?

Data: U.S. EPA · How we read the data · How we check it

Summary

No federal limits exceeded in EPA data for City of Mandan.

2 public water systems serve parts of Mandan. The largest, City of Mandan, serves 21,769 people. Your water bill names your system.

Largest system

City of Mandan

21,769 people · Surface water · EPA ID ND3000596

PFASHighest averageLimitStatus
PFOA
Not detected
–4 pptNot detected
PFOS
Not detected
–4 pptNot detected
PFHxS
Not detected
–10 pptNot detected
PFNA
Not detected
–10 pptNot detected
HFPO-DA (GenX)
Not detected
–10 pptNot detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

Lead: 4.2 ppb at the 90th percentile (Nov 2026, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Across North Dakota, 0 of 41 water systems EPA tested had PFAS above a 2024 federal limit, and 3 systems were above the lead action level in results from the last five years. North Dakota results.

Mandan homes and lead pipes

49%
of homes built before 1980 (North Dakota 48%, US 50%)
11%
built before 1950 (North Dakota 15%)
31%
of households rent (North Dakota 37%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Mandan city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Mandan

  • Riverview Heights Water System
    200 people · Purchased surface water · North Dakota · lists this city
    Not in EPA's PFAS sample

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Bismarck 6 mi
City of Bismarck
City of BismarckNone above limits2.8 ppb
Dickinson 90 mi
City of Dickinson
City of DickinsonNone above limits5.29 ppb
Minot 99 mi
City of Minot
City of MinotNone above limits13.5 ppb
Williston 160 mi
City of Williston
City of WillistonNone above limits0 ppb
West Fargo 188 mi
City of West Fargo
City of West FargoNone above limits0 ppb
Fargo 192 mi
City of Fargo
City of FargoNone above limits1.89 ppb
Mandan ZIP codes (1)
  • 58554

Questions

Is Mandan tap water safe to drink?

City of Mandan has had no health-based violations since 2016. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Mandan, ND?

2 public water systems serve parts of Mandan. The largest is City of Mandan (21,769 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Mandan tap water have PFAS?

None detected above EPA's reporting limits. City of Mandan had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.

Do Mandan homes have lead pipes?

Census estimates put 49% of Mandan homes as built before 1980 (North Dakota: 48%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. City of Mandan's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.