PFAS above a 2024 limit
MCL0of 8 cities
Cities whose system reported a PFAS above its federal limit.
PFOS in North Dakota →State water report
North Dakota Water Quality: 8 Cities Ranked by the Records
Water quality across 8 cities in North Dakota, drawn from EPA drinking-water records. Each city page shows the measured contaminants and a reproducible Purity Score.
Finding by finding
What North Dakota's records show
Counts of cities whose serving system reported each result. There is no statewide score: PurityMap does not average local records into a statewide safety verdict. 1 city has a past health-based violation on record.
Lead detected
Action level6of 8 cities
90th-percentile lead above zero.
Lead across North Dakota →Lead above action level
Action level0of 8 cities
No city on record above 15 µg/L.
How lead is measured →City rankings
North Dakota cities ranked by the records
Highest first. A summary of each serving system’s record, not a safety verdict.
- 1West FargoWEST FARGO CITY OF · ND0900999Report →
- 2WillistonWILLISTON CITY OF · ND5301012Report →
- 3BismarckBISMARCK CITY OF · ND0800080Report →
- 4FargoFARGO CITY OF · ND0900336Report →
- 5DickinsonDICKINSON CITY OF · ND4500242Report →
- 6MandanMANDAN CITY OF · ND3000596Report →
- 7JamestownJAMESTOWN CITY OF · ND4700498Report →
- 8MinotMINOT CITY OF · ND5100660Report →
Showing the top 8 of 8 scored cities.
Highest 90th-percentile result first. The tick marks the 15 µg/L action level.
- 1MinotMINOT CITY OF · ND510066013.5 µg/LReport →
- 2JamestownJAMESTOWN CITY OF · ND470049810.9 µg/LReport →
- 3MandanMANDAN CITY OF · ND30005966.22 µg/LReport →
- 4DickinsonDICKINSON CITY OF · ND45002425.29 µg/LReport →
- 5BismarckBISMARCK CITY OF · ND08000802.8 µg/LReport →
- 6FargoFARGO CITY OF · ND09003362.34 µg/LReport →
Showing the top 6 of 6 cities with a lead result.
See all 8 in the table
8 cities, highest Purity Score first
- WEST FARGO CITY OF · PWSID ND0900999 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system levelNo PFAS detectedNot detected
- WILLISTON CITY OF · PWSID ND5301012 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system levelNo PFAS detectedNot detected
- BISMARCK CITY OF · PWSID ND0800080 · Purity Score 97/100 (Excellent) · Confidence: moderate · Assessed at the water-system levelNo PFAS detected; lead 2.8 µg/LDetected
- FARGO CITY OF · PWSID ND0900336 · Purity Score 95/100 (Excellent) · Confidence: moderate · Assessed at the water-system levelPast bromate violation on recordDetected
- DICKINSON CITY OF · PWSID ND4500242 · Purity Score 94/100 (Excellent) · Confidence: moderate · Assessed at the water-system levelNo PFAS detected; lead 5.29 µg/LDetected
- MANDAN CITY OF · PWSID ND3000596 · Purity Score 93/100 (Excellent) · Confidence: moderate · Assessed at the water-system levelNo PFAS detected; lead 6.22 µg/LDetected
- JAMESTOWN CITY OF · PWSID ND4700498 · Purity Score 88/100 (Good) · Confidence: moderate · Assessed at the water-system levelNo PFAS detected; lead 10.9 µg/LDetected
- MINOT CITY OF · PWSID ND5100660 · Purity Score 85/100 (Good) · Confidence: moderate · Assessed at the water-system levelNo PFAS detected; lead 13.5 µg/LDetected
End of list.
Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no state score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works. See how North Dakota compares with other states.
By contaminant
lead in North Dakota
Lead
Action level90th-percentile result, by city.
| 15 µg/L action level · none above
Counties
7 counties with city reportsNorth Dakota counties
- Cass County2 cities
- Burleigh County1 city
- Morton County1 city
- Stark County1 city
- Stutsman County1 city
- Ward County1 city
- Williams County1 city
Suppliers
Largest water systems
- FARGO CITY OFFargo · ND0900336 · 120,762 served
- BISMARCK CITY OFBismarck · ND0800080 · 72,417 served
- MINOT CITY OFMinot · ND5100660 · 48,743 served
- WEST FARGO CITY OFWest Fargo · ND0900999 · 34,858 served
- WILLISTON CITY OFWilliston · ND5301012 · 26,426 served
- DICKINSON CITY OFDickinson · ND4500242 · 25,679 served
Next step
State patterns can’t tell you what reaches your tap.
Learn
Learn your supplier
Resolve your address to the one public water system that serves it.
Find my water →Test
Test your own tap
Plumbing inside a building can add lead and change what reaches your glass.
How to test →Solve
Treat by concern
Only after a city report names a finding, match a treatment certified for it.
Treatment options →Questions
North Dakota water, frequently asked
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How does North Dakota tap water compare across cities?
PurityMap ranks 8 cities in North Dakota by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is West Fargo's main water system: WEST FARGO CITY OF · PWSID ND0900999 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.
How many North Dakota cities have PFAS above the federal limit?
None of the 8 North Dakota cities on record had a regulated PFAS above the 2024 federal limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 0.
Is there lead in North Dakota tap water?
Utilities report lead as a 90th-percentile result from home taps. 6 of 8 North Dakota cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
Have North Dakota water systems had drinking-water violations?
1 city in North Dakota has a health-based violation in the federal SDWIS record within about the last ten years. Each city report lists the contaminant, year and whether it was resolved.
Limits, sources and corrections
A statewide page cannot tell you what reaches a specific address. Water quality varies by supplier, sampling period and household plumbing; open a city report for the evidence behind a local result.
Sources: EPA UCMR 5 (PFAS, 2024), SDWIS Lead and Copper Rule 90th-percentile results and health-based violations, and utility Consumer Confidence Reports where on file. Every city report links its dated source records.
Updated 2026-09-16. How PurityMap analyzes water data · Report an error