Union Water Supply, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 2.8 ppb (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. 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.
Union Water Supply at a glance
Union Water Supply serves about 399 people through 212 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 groundwater, in Hardin County, Iowa. EPA system ID: IA4291038; phone on file: 641-521-0741. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is up 2.8 ppb from 0 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Union Water Supply is 2.8 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 2.8 ppb |
| 2020 | 0 (not detected) |
| 2017 | 2 ppb |
How Union Water Supply compares
Of the 1,066 Iowa systems with a lead result, the median latest reading is 1.4 ppb; 4 are over 15 ppb right now and 36 have gone over at some point. Union Water Supply's 2.8 ppb sits at the 73rd percentile in Iowa and the 80th nationally (higher means more lead).
Other water systems in Hardin County
10 other systems share Hardin County; 3 of them have a higher latest lead result than Union Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Iowa Falls Water Department | 5,146 | 9 ppb |
| Eldora Water Supply | 2,664 | 3 ppb |
| Ackley Municipal Water Works | 1,599 | 3.2 ppb |
| Hubbard Water Supply | 860 | 0 (not detected) |
| Alden Water Supply | 764 | 2 ppb |
| Radcliffe Municipal Water | 561 | 1 ppb |
| Steamboat Rock Water Dept | 264 | 2.4 ppb |
| New Providence Water Supply | 236 | 0 (not detected) |
| Pinecrest Mhp | 113 | - |
| Chase Mobile Home Park | 85 | 0 (not detected) |
Next steps for Newton, IA
Test your own tap with a certified lab first-draw sample; Newton, IA 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 Union Water Supply 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. Systems that went over once often dip back under; here is what that means.