Coulter Water Supply, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 2 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.
About Coulter Water Supply
Coulter Water Supply serves about 219 people through 121 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 Franklin County, Iowa. EPA system ID: IA3525079; phone on file: 641-580-4025. They can tell you what your service line is made of and whether they pay to replace it.
Coulter Water Supply's lead record
Against the period ending 2020 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Coulter Water Supply is 2 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 2 ppb |
| 2020 | 2 ppb |
| 2017 | 1 ppb |
How Coulter 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. Coulter Water Supply's 2 ppb sits at the 61st percentile in Iowa and the 70th nationally (higher means more lead).
Other water systems in Franklin County
8 other systems share Franklin County; 3 of them have a higher latest lead result than Coulter Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hampton Muni Water Works | 4,337 | 6.2 ppb |
| Sheffield Water Supply | 1,130 | 1 ppb |
| Latimer Water Supply | 477 | 2 ppb |
| Alexander Water Dept | 164 | 0 (not detected) |
| Geneva Water Works | 136 | 2 ppb |
| Hansell Water Department | 82 | 4 ppb |
| Beeds Lake Home Owners Association | 75 | 0 (not detected) |
| Dorell Drive Home Owners Association | 32 | 4 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Coulter, 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 Coulter 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.