Rudd Waterworks, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.4 ppb (monitoring period 2021-2023). 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.
Rudd Waterworks at a glance
Rudd Waterworks serves about 358 people through 197 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 Floyd County, Iowa. EPA system ID: IA3440007; phone on file: 641-395-2760. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 2 ppb from 3.4 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Rudd Waterworks is 3.4 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.4 ppb |
| 2020 | 3.4 ppb |
| 2017 | 2.6 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. Rudd Waterworks's 1.4 ppb sits at the 50th percentile in Iowa and the 62nd nationally (higher means more lead).
Other water systems in Floyd County
6 other systems share Floyd County; 6 of them have a higher latest lead result than Rudd Waterworks. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Charles City Water Supply | 7,446 | 6.2 ppb |
| Nora Springs Water Supply | 1,369 | 6 ppb |
| Rockford Water Supply | 762 | 2 ppb |
| Floyd Muni Water Supply | 313 | 10 ppb |
| Marble Rock Water Supply | 272 | 2 ppb |
| Colwell, City Of | 55 | 2.46 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Rudd, 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 Rudd Waterworks 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Size matters more than most people expect: small vs large water systems.