Ladora Water Supply, IA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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.
Who runs the water here
Ladora Water Supply serves about 229 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 groundwater, in Iowa County, Iowa. EPA system ID: IA4840042; phone on file: 319-231-3577. They can tell you what your service line is made of and whether they pay to replace it.
Ladora Water Supply's lead record
That is down 8 ppb from 8 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Ladora Water Supply is 9.9 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 8 ppb |
| 2019 | 8.2 ppb |
| 2018 | 8.3 ppb |
| 2017 | 9.1 ppb |
| 2017 | 6.3 ppb |
| 2016 | 9.9 ppb |
Against other Iowa systems
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. Ladora Water Supply's reported as 0 (not detected) sits at the 12th percentile in Iowa and the 16th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Iowa County
10 other systems share Iowa County; 7 of them have a higher latest lead result than Ladora Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Williamsburg Public Water Supply | 3,345 | 3 ppb |
| Poweshiek Water Association (Iac) | 2,490 | 0.9 ppb |
| Marengo Water Supply | 2,435 | 1.2 ppb |
| Amana Society Water System North | 1,248 | 0 (not detected) |
| North English Water Department | 1,065 | 0 (not detected) |
| Victor Municipal Water Dept | 875 | 18.2 ppb |
| South Amana Water Supply | 300 | 2 ppb |
| Millersburg Water Dept | 135 | 0 (not detected) |
| Waldenburg Community Water System | 90 | 2 ppb |
| Iowa Valley Estates | 46 | 8 ppb |
Your move
Look up your address in Ladora Water Supply'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 Ladora Water Supply whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1630 ppb (copper action level 1,300 ppb).
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.