Cardinal Valley Estates 3rd Addition, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 0.82 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.
About Cardinal Valley Estates 3rd Addition
Cardinal Valley Estates 3rd Addition serves about 25 people through 13 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Clinton County, Iowa. EPA system ID: IA2330303. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 5.18 ppb from 6 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Cardinal Valley Estates 3rd Addition is 6 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.82 ppb |
| 2022 | 6 ppb |
| 2019 | 4.8 ppb |
| 2016 | 4.1 ppb |
How Cardinal Valley Estates 3rd Addition 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. Cardinal Valley Estates 3rd Addition's 0.82 ppb sits at the 37th percentile in Iowa and the 48th nationally (higher means more lead).
Neighbouring systems
15 other systems share Clinton County; 9 of them have a higher latest lead result than Cardinal Valley Estates 3rd Addition. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Iowa-American Wtr Co-Clinton District | 24,769 | 2 ppb |
| De Witt Water Supply | 5,514 | 3.4 ppb |
| Camanche Water Supply | 4,570 | 2 ppb |
| Wheatland City Water Supply | 775 | 3.2 ppb |
| Grand Mound Water Supply | 615 | 0 (not detected) |
| Delmar Water Supply | 542 | 2 ppb |
| Lost Nation Water Supply | 434 | 5 ppb |
| Charlotte Water Works | 401 | 0 (not detected) |
| Calamus Water Supply | 356 | 0 (not detected) |
| Iowa-American Water (Low Moor) | 250 | 1.6 ppb |
Your move
Test your own tap with a certified lab first-draw sample; De Witt, 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 Cardinal Valley Estates 3rd Addition 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. The action level is dropping - the 10 ppb rule from 2027.