Zap City Of, ND
Lead detected, under the action levels
Latest 90th-percentile lead: 2.96 ppb (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
Zap City Of serves about 237 people through 120 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Mercer County, North Dakota. EPA system ID: ND2901054. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2022 (2.51 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Zap City Of is 3.55 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.96 ppb |
| 2022 | 2.51 ppb |
| 2019 | 2.46 ppb |
| 2016 | 3.55 ppb |
How Zap City Of 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. Zap City Of's 2.96 ppb sits at the 84th percentile in North Dakota and the 81st nationally (higher means more lead).
Other water systems in Mercer County
6 other systems share Mercer County; 1 of them has a higher latest lead result than Zap City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Omnd Water Treatment Plant | 4,168 | 0 (not detected) |
| Beulah City Of | 3,058 | 0 (not detected) |
| Hazen City Of | 2,411 | 4.1 ppb |
| Stanton City Of | 366 | 1.47 ppb |
| Golden Valley City Of | 182 | 0.79 ppb |
| Pick City City Of | 123 | 0.52 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Zap, 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 Zap 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.