Dedham Water Supply, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2024-2024). 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.
Dedham Water Supply at a glance
Dedham Water Supply serves about 221 people through 120 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Carroll County, Iowa. EPA system ID: IA1433016; phone on file: 712-830-4415. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Dedham Water Supply is 1 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1 ppb |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
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. Dedham Water Supply's 1 ppb sits at the 41st percentile in Iowa and the 52nd nationally (higher means more lead).
Nearby utilities
12 other systems share Carroll County; 8 of them have a higher latest lead result than Dedham Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Carroll Municipal Water Supply | 10,321 | 8 ppb |
| West Central Rwa - Nish System | 3,573 | 1.7 ppb |
| Manning Water Supply | 1,392 | 2 ppb |
| Coon Rapids Municipal Utilities | 1,242 | 0 (not detected) |
| Glidden Water Supply | 1,140 | 2.1 ppb |
| Arcadia Water Supply | 525 | 8.4 ppb |
| Breda Water Supply | 502 | 0 (not detected) |
| Templeton Water Supply | 352 | 2.8 ppb |
| Halbur Water Supply | 249 | 4 ppb |
| Lidderdale Water Supply | 166 | 0.6 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Dedham, 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 Dedham 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. Systems that went over once often dip back under; here is what that means.