Hickory Hills Subdivision #1, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.6 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. 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 Hickory Hills Subdivision #1
Hickory Hills Subdivision #1 serves about 75 people through 34 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: IA8215302; phone on file: 563-332-6820. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2022 (1.8 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hickory Hills Subdivision #1 is 4.4 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.6 ppb |
| 2022 | 1.8 ppb |
| 2019 | 2.6 ppb |
| 2016 | 4.4 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. Hickory Hills Subdivision #1's 1.6 ppb sits at the 53rd percentile in Iowa and the 65th nationally (higher means more lead).
Neighbouring systems
47 other systems share Scott County; 19 of them have a higher latest lead result than Hickory Hills Subdivision #1. 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; Davenport, 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 Hickory Hills Subdivision #1 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Systems that went over once often dip back under; here is what that means.