Timber Valley Estates (Third Addition), IA
Exceeded the action level in the past
Latest 90th-percentile lead: 0.6 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. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Timber Valley Estates (Third Addition)
Timber Valley Estates (Third Addition) serves about 73 people through 21 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Scott County, Iowa. EPA system ID: IA8215385; phone on file: 563-381-3619. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2022 (1.4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Timber Valley Estates (Third Addition) is 26.4 ppb across 7 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.6 ppb |
| 2022 | 1.4 ppb |
| 2019 | 4.1 ppb |
| 2018 | 3.6 ppb |
| 2017 | 2.2 ppb |
| 2017 | 0.6 ppb |
| 2016 | 26.4 ppb over 15 |
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. Timber Valley Estates (Third Addition)'s 0.6 ppb sits at the 34th percentile in Iowa and the 44th nationally (higher means more lead).
Nearby utilities
47 other systems share Scott County; 33 of them have a higher latest lead result than Timber Valley Estates (Third 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-Davenport | 147,720 | 1 ppb |
| Eldridge Water Supply | 6,726 | 1.3 ppb |
| Park View Water & Sanitary District | 2,389 | 1 ppb |
| Walcott Waterworks | 1,551 | 0 (not detected) |
| Buffalo Water Supply | 1,176 | 0 (not detected) |
| Princeton Water Supply | 923 | 5.2 ppb |
| Long Grove Muni Water Supply | 838 | 1.5 ppb |
| Iowa American Water Donahue | 335 | 0 (not detected) |
| Ponderosa Park Mhp | 320 | 0 (not detected) |
| Village Oaks Homeowners Assn | 250 | 2 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Blue Grass, 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 Timber Valley Estates (Third 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. Why an old exceedance still matters: over the limit before, under it now.