Knollcrest Hoa, IA
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 14 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. 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.
Knollcrest Hoa at a glance
Knollcrest Hoa serves about 42 people through 17 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: IA8222301; phone on file: 563-289-3373. They can tell you what your service line is made of and whether they pay to replace it.
Knollcrest Hoa's lead record
That is up 13.1 ppb from 0.9 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Knollcrest Hoa is 14 ppb across 4 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 14 ppb over 10 |
| 2022 | 0.9 ppb |
| 2019 | 0.5 ppb |
| 2016 | 5 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. Knollcrest Hoa's 14 ppb sits at the 99th percentile in Iowa and the 98th nationally (higher means more lead).
Neighbouring systems
47 other systems share Scott County; 0 of them have a higher latest lead result than Knollcrest Hoa. 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 |
What to do in your house
Test your own tap with a certified lab first-draw sample; Leclaire, 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 Knollcrest Hoa whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1800 ppb (copper action level 1,300 ppb).
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. This system is in the band the 2027 10 ppb rule changes.