Tap water quality in Williston, North Dakota
Williston's water systems logged 1 health-based EPA violation in 2021–2026, most recently in 2024 — a modest record, with lead and copper rule revisions the issue found. For context, North Dakota's systems average 1.2 health-based violations each.
Averages describe states, not your faucet. A certified home water test screens for lead, nitrates, bacteria and dozens of other contaminants — the same categories EPA regulates.
Test your water at homeWe may earn a commission if you request quotes through this link. It costs you nothing and never affects the data we publish.
Williston tap water FAQ
Is tap water safe to drink in Williston?
Williston's systems logged 1 health-based violation in 2021–2026, most commonly lead and copper rule revisions. A violation is a red flag for a period of time, not a permanent condition — your utility's current Consumer Confidence Report shows today's status, and a certified home test shows what's at your tap.
Who supplies Williston's water?
Williston City Of (serving about 26,426 people); Northwest Rural Water District (serving about 5,102 people); Inspire Communities-Springbrook (serving about 300 people); Prairie View Hoa (serving about 226 people). Data: EPA Safe Drinking Water Information System, July 2026.
How hard is the water in Williston?
City-level hardness isn't published in a single federal dataset, but North Dakota averages 130 PPM — "hard" on the USGS scale. Your utility's water quality report lists Williston's exact hardness, or a $10 test strip tells you in a minute. If it comes back over 120 PPM, see our water softener guidance in the purification calculator.
Do I need a water filter in Williston?
With 1 health-based violation on record in 2021–2026, a certified filter is reasonable insurance here: reverse osmosis ($150–$1,300 installed, Angi 2026) covers lead, nitrates and PFAS at the tap. Test first ($50–$200) so you buy for what's actually present.
Averages describe states, not your faucet. A certified home water test screens for lead, nitrates, bacteria and dozens of other contaminants — the same categories EPA regulates.
Test your water at homeWe may earn a commission if you request quotes through this link. It costs you nothing and never affects the data we publish.