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Counties → North Dakota

Williams County, North Dakota

Water Systems
22
Population Served
38,366
Total Violations
564
77 health-based
PFAS Detected
3
of 3 tested

Violation Analysis

95.5%
Systems with Violations
25.6
Avg Violations per System
13.7%
Health-Based Violations

Water Source Types

SW
16 systems (73%)
GW
6 systems (27%)

PFAS Contamination

3
Systems Tested
3
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Williams North Dakota water systems by violation status, EPA SDWIS records.

No violations on record (1) One or more violations (21)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Williston City Of 26,426 42 Clean
Northwest Rural Water District 5,102 26 Detected
Tioga City Of 2,202 7 -
R & T Water System 1,003 10 -
Ray City Of 950 5 -
Trenton Water Users Assoc 840 59 -
Glacier Potable Water 500 16 -
Inspire Communities-Springbrook 300 62 -
Grenora City Of 244 73 Clean
Prairie View HOA 226 53 -
Wildrose City Of 110 56 -
Missouri-Yellowstone Interpretive Center 100 39 -
Stallion Oilfield Services-Williston 90 14 -
13 Mile Center 50 16 -
Big Country RV Park 48 7 -
Little Beaver Bay Rec Area 40 17 -
Fendee Estates 30 16 -
The Bluffs HOA 30 9 -
Mondak Portables (Water Hauler) 30 4 -
B & B RV 25 22 -
Little Egypt Campground 20 11 -
Western Area Water Supply Authority 0 0 -

Other Counties in North Dakota

Cass County
27 systems · 176,764 served · 915 violations
Burleigh County
12 systems · 92,574 served · 263 violations
Grand Forks County
9 systems · 69,787 served · 232 violations
Ward County
14 systems · 65,645 served · 589 violations
Stark County
8 systems · 36,506 served · 136 violations
Morton County
13 systems · 29,721 served · 464 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Williams County? ▼
Williams County has 564 total drinking water violations across 22 water systems, of which 77 are health-based violations. 95.5% of systems have at least one violation.
How many people get water from Williams County systems? ▼
Water systems in Williams County serve approximately 38,366 people through 22 public water systems.
Has PFAS been detected in Williams County water? ▼
Of 3 water systems tested for PFAS in Williams County, 3 had PFAS detected (100.0% detection rate).
What types of water sources supply Williams County? ▼
Water systems in Williams County use SW (16 systems), GW (6 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 13.7% of Williams County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.