North Coralville Lake Manor, IA
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 14 ppb (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
Who runs the water here
North Coralville Lake Manor serves about 55 people through 20 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Johnson County, Iowa. EPA system ID: IA5200889; phone on file: 319-329-7126. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is up 2 ppb from 12 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for North Coralville Lake Manor is 14 ppb across 3 monitoring periods, none of them over 15 ppb (3 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 14 ppb over 10 |
| 2021 | 12 ppb over 10 |
| 2018 | 12 ppb over 10 |
Where this result ranks
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. North Coralville Lake Manor's 14 ppb sits at the 99th percentile in Iowa and the 98th nationally (higher means more lead).
Nearby utilities
74 other systems share Johnson County; 0 of them have a higher latest lead result than North Coralville Lake Manor. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Iowa City Water Department | 68,753 | 4 ppb |
| University Water System | 47,136 | 0 (not detected) |
| North Liberty Water Supply | 23,276 | 0 (not detected) |
| Coralville Muni Water System | 22,318 | 3 ppb |
| Tiffin Water Supply | 7,577 | 0 (not detected) |
| Solon Water Dept | 3,018 | 7 ppb |
| Lone Tree Muni Water System | 1,357 | 2 ppb |
| Lake Ridge, Incorporated | 1,300 | 0 (not detected) |
| Modern Manor, Inc | 915 | 1 ppb |
| Hills Water Supply | 863 | 2 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Solon, 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 North Coralville Lake Manor 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. See what changes at 10 ppb in 2027.