Evansdale Water Works, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.2 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 Evansdale Water Works
Evansdale Water Works serves about 4,561 people through 2,028 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Black Hawk County, Iowa. EPA system ID: IA0723027; phone on file: 319-231-4717. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 7 ppb from 8.2 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Evansdale Water Works is 8.2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.2 ppb |
| 2022 | 8.2 ppb |
| 2019 | 0 (not detected) |
| 2016 | 1.4 ppb |
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. Evansdale Water Works's 1.2 ppb sits at the 48th percentile in Iowa and the 59th nationally (higher means more lead).
Other water systems in Black Hawk County
9 other systems share Black Hawk County; 4 of them have a higher latest lead result than Evansdale Water Works. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Waterloo Water Works | 69,504 | 1.8 ppb |
| Cedar Falls Municipal Water Utilities | 40,713 | 1.4 ppb |
| Hudson Water Supply | 2,546 | 3.21 ppb |
| La Porte City Utilities | 2,284 | 1 ppb |
| Elk Run Heights Water Supply | 1,069 | 0 (not detected) |
| Dunkerton Muni Water Supply | 842 | 1.2 ppb |
| Gilbertville Water Works | 796 | 0 (not detected) |
| Cedar Falls Mobile Home Village | 388 | 1.24 ppb |
| Lenwood Utilities | 238 | 0 (not detected) |
Next steps for Evansdale, IA
Test your own tap with a certified lab first-draw sample; Evansdale, 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 Evansdale Water Works 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. Size matters more than most people expect: small vs large water systems.