Greene Muni Water Supply, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 6.02 ppb (monitoring period 2024-2026). 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 Greene Muni Water Supply
Greene Muni Water Supply serves about 994 people through 575 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 Butler County, Iowa. EPA system ID: IA1253006; phone on file: 641-816-4631. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2023 (5.5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Greene Muni Water Supply is 6.02 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 6.02 ppb |
| 2023 | 5.5 ppb |
| 2020 | 4.2 ppb |
| 2017 | 5.6 ppb |
How Greene Muni 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. Greene Muni Water Supply's 6.02 ppb sits at the 93rd percentile in Iowa and the 93rd nationally (higher means more lead).
Other water systems in Butler County
8 other systems share Butler County; 2 of them have a higher latest lead result than Greene Muni Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Parkersburg Water Supply | 2,019 | 14.6 ppb |
| Shell Rock Muni Water Supp | 1,269 | 4.6 ppb |
| Clarksville Water Supply | 1,254 | 2.16 ppb |
| Aplington Water Supply | 1,126 | 3.4 ppb |
| Allison Water Supply | 966 | 7.6 ppb |
| Dumont Water Supply | 635 | 3 ppb |
| New Hartford Water Supply | 570 | 0.7 ppb |
| Bristow Muni Water Supply | 145 | 1.2 ppb |
Next steps for Greene, IA
Test your own tap with a certified lab first-draw sample; Greene, 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 Greene Muni 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. 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.