Squaw Valley South Subdivision, IA
Exceeded the action level in the past
Latest 90th-percentile lead: 6 ppb (monitoring period 2026-2026). 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 Squaw Valley South Subdivision
Squaw Valley South Subdivision serves about 105 people through 42 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Story County, Iowa. EPA system ID: IA8503305; phone on file: 641-483-2904. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Squaw Valley South Subdivision's lead record
That is down 24 ppb from 30 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Squaw Valley South Subdivision is 47 ppb across 8 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 6 ppb |
| 2025 | 30 ppb over 15 |
| 2025 | 10 ppb |
| 2024 | 2 ppb |
| 2024 | 47 ppb over 15 |
| 2022 | 3 ppb |
| 2019 | 3 ppb |
| 2016 | 1 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. Squaw Valley South Subdivision's 6 ppb sits at the 91st percentile in Iowa and the 93rd nationally (higher means more lead).
Neighbouring systems
18 other systems share Story County; 2 of them have a higher latest lead result than Squaw Valley South Subdivision. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ames Water Treatment Plant | 55,177 | 0 (not detected) |
| Isu | 42,000 | 1.2 ppb |
| Nevada Water Supply | 6,925 | 0 (not detected) |
| Huxley Waterworks Dept | 4,244 | 1.1 ppb |
| Story City Water Dept | 3,357 | 0 (not detected) |
| Slater Muni Water Dept | 1,548 | 7 ppb |
| Roland Water Supply | 1,394 | 0 (not detected) |
| Gilbert Water Supply | 1,211 | 0 (not detected) |
| Maxwell Water Department | 859 | 4 ppb |
| Colo Water Supply | 853 | 1.1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; State Center, 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 Squaw Valley South Subdivision 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. More in what a past exceedance means today.