Williston City Of, ND
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2021-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About Williston City Of
Williston City Of serves about 26,426 people through 6,876 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Williams County, North Dakota. EPA system ID: ND5301012; phone on file: 701-557-7104. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2020 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Williston City Of is 1.48 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2017 | 1.48 ppb |
Against other North Dakota systems
Of the 300 North Dakota systems with a lead result, the median latest reading is 0.91 ppb; 3 are over 15 ppb right now and 20 have gone over at some point. Williston City Of's reported as 0 (not detected) sits at the 42nd percentile in North Dakota and the 39th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
9 other systems share Williams County; 3 of them have a higher latest lead result than Williston City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Northwest Rural Water District | 5,102 | 0 (not detected) |
| Tioga City Of | 2,202 | 0 (not detected) |
| R & T Water System | 1,003 | 1.67 ppb |
| Ray City Of | 950 | 0 (not detected) |
| Trenton Water Users Assoc | 840 | 0.8 ppb |
| Grenora City Of | 244 | 0 (not detected) |
| Prairie View Hoa | 226 | 0 (not detected) |
| Wildrose City Of | 110 | 26.3 ppb |
| Western Area Water Supply Authority | - | - |
Your move
Look up your address in Williston City Of's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Williston City Of whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. Why sampled homes are the worst-case ones is in the guide to reading the number. Small systems behave differently: why small systems go over more often.