Dayton Municipal Water Supply, IA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Dayton Municipal Water Supply serves about 772 people through 358 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 Webster County, Iowa. EPA system ID: IA9425011; phone on file: 515-571-5070. 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 2021 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Dayton Municipal Water Supply is 0 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
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. Dayton Municipal Water Supply's reported as 0 (not detected) sits at the 22nd percentile in Iowa and the 25th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
22 other systems share Webster County; 13 of them have a higher latest lead result than Dayton Municipal Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Fort Dodge Water Supply | 25,874 | 1 ppb |
| Gowrie Muni Utilities Water Dept | 954 | 3 ppb |
| Badger Water Supply | 561 | 1 ppb |
| Otho Water Supply | 431 | 1 ppb |
| Palace Park Mhc | 426 | 0 (not detected) |
| Lehigh Water Supply | 395 | 0 (not detected) |
| Duncombe Water Supply | 384 | 0 (not detected) |
| Callender Water Supply | 371 | 0 (not detected) |
| Harcourt Water Supply | 265 | 2 ppb |
| Barnum Water Supply | 175 | 10 ppb |
Next steps for Fort Dodge, IA
Look up your address in Dayton Municipal Water Supply's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Dayton Municipal 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. The lead result guide covers how utilities pick the homes they sample. A zero today does not rule out a jump later - the rules are tightening in 2027.