Denver Water Supply, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.43 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. 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.
Denver Water Supply at a glance
Denver Water Supply serves about 1,919 people through 867 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Bremer County, Iowa. EPA system ID: IA0915030; phone on file: 319-984-5642. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2021 (1.86 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Denver Water Supply is 1.86 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1.43 ppb |
| 2021 | 1.86 ppb |
| 2018 | 0.69 ppb |
How Denver Water Supply 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. Denver Water Supply's 1.43 ppb sits at the 51st percentile in Iowa and the 63rd nationally (higher means more lead).
Nearby utilities
8 other systems share Bremer County; 4 of them have a higher latest lead result than Denver Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Waverly Water Department | 10,394 | 6.73 ppb |
| Sumner Water Supply | 2,030 | 0 (not detected) |
| Tripoli Water Supply | 1,191 | 0 (not detected) |
| Janesville Water Supply | 1,034 | 5.4 ppb |
| Readlyn Water Supply | 845 | 1.6 ppb |
| Plainfield Water Supply | 393 | 4 ppb |
| Meadow Lane Mobile Home Park | 168 | 0.6 ppb |
| Saints Avenue Apartments | 125 | 0 (not detected) |
Next steps for Denver, IA
Test your own tap with a certified lab first-draw sample; Denver, 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 Denver Water Supply 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. The action level is dropping - the 10 ppb rule from 2027.