Public water system record
City of Williston
Serves Williston, Williams County, ND · 26,426 people served
Federal records show no health-based violations and no monitoring or reporting issues for City of Williston in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- City of Williston draws water from 1 surface water intake.
- Record on file since 1991, with 8 health-based violations before October 19, 2016.
- Lead pipe inventory: 72 lead and 307 unknown out of 8,494 service lines.
Check whether City of Williston serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016, and no monitoring or reporting violations either.
Full record since 1991
EPA's records for City of Williston go back to 1991. Before October 19, 2016 they list 8 health-based violations (6 resolved, 2 archived by EPA without a recorded fix) and 3 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 3 | 1 |
| 2000s | 3 | 0 |
| 2010 to October 18, 2016 | 2 | 2 |
Most recent health-based violation before October 19, 2016: Long Term 2 Enhanced Surface Water Treatment Rule, began June 2014, Resolved.
Show all 8 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 2014 | Resolved |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 2011 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Jan 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Oct 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Jul 1, 2005 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 1994 | Archived |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
|
Jan 1, 1994 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Sep 1, 1993 | Archived |
Where the water comes from
City of Williston draws water from 1 surface water intake. 3 other community water systems and 4 smaller public systems such as schools, businesses or campgrounds buy water from City of Williston.
Community systems that buy water from it
- Inspire Communities-Springbrook Williston, ND
- Trenton Water Users Assoc Trenton, ND
- Western Area Water Supply Authority Williston, ND
Annual water quality report
City of Williston must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by North Dakota.
Certified drinking water labs by state EPA guidance for private wells