North Prairie Rwd System Iv, ND
Exceeded the action level in the past
Latest 90th-percentile lead: 1.36 ppb (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
North Prairie Rwd System Iv serves about 30 people through 12 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Mountrail County, North Dakota. EPA system ID: ND3101807; phone on file: 701-852-1886. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 1.02 ppb from 2.38 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for North Prairie Rwd System Iv is 15.5 ppb across 3 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.36 ppb |
| 2025 | 2.38 ppb |
| 2024 | 15.5 ppb over 15 |
How North Prairie Rwd System Iv compares
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. North Prairie Rwd System Iv's 1.36 ppb sits at the 60th percentile in North Dakota and the 61st nationally (higher means more lead).
Neighbouring systems
3 other systems share Mountrail County; 1 of them has a higher latest lead result than North Prairie Rwd System Iv. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Stanley City Of | 1,138 | 0 (not detected) |
| Plaza City Of | 171 | 1.54 ppb |
| Ross City Of | 97 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Minot, ND may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask North Prairie Rwd System Iv 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. The lead result guide covers how utilities pick the homes they sample. Why an old exceedance still matters: over the limit before, under it now.