Cherokee Rws- Mill Creek Subsystem, IA
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 11.6 ppb (monitoring period 2022-2024). 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.
Cherokee Rws- Mill Creek Subsystem at a glance
Cherokee Rws- Mill Creek Subsystem serves about 1,451 people through 603 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Cherokee County, Iowa. EPA system ID: IA1800900; phone on file: 712-225-6193. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is up 9.8 ppb from 1.8 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Cherokee Rws- Mill Creek Subsystem is 11.6 ppb across 3 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 11.6 ppb over 10 |
| 2021 | 1.8 ppb |
| 2018 | 2 ppb |
How Cherokee Rws- Mill Creek Subsystem 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. Cherokee Rws- Mill Creek Subsystem's 11.6 ppb sits at the 98th percentile in Iowa and the 98th nationally (higher means more lead).
Neighbouring systems
10 other systems share Cherokee County; 0 of them have a higher latest lead result than Cherokee Rws- Mill Creek Subsystem. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cherokee Water Supply - Plant 1 | 5,199 | 1.5 ppb |
| Cherokee Rws - Cherokee Subsystem | 3,315 | 2.2 ppb |
| Marcus Water Supply | 1,079 | 1.5 ppb |
| Aurelia Water Supply | 968 | 1.5 ppb |
| Quimby Water Supply | 249 | 0.5 ppb |
| Cleghorn Water Supply | 247 | 0 (not detected) |
| Washta Water Supply | 209 | 1.2 ppb |
| Meriden Municipal Water Supply | 161 | 3 ppb |
| Larrabee Municipal Water Works | 125 | 0 (not detected) |
| Hilltop Village Mhc, Inc. | 78 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Cherokee, 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 Cherokee Rws- Mill Creek Subsystem 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. See what changes at 10 ppb in 2027.