Montour Water Supply, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 2.2 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.
About Montour Water Supply
Montour Water Supply serves about 203 people through 109 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 Tama County, Iowa. EPA system ID: IA8666002; phone on file: 641-751-6277. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Montour Water Supply's lead record
Against the period ending 2023 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Montour Water Supply is 3.8 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2.2 ppb |
| 2023 | 2 ppb |
| 2022 | 1.8 ppb |
| 2021 | 1.5 ppb |
| 2019 | 3.8 ppb |
| 2016 | 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. Montour Water Supply's 2.2 ppb sits at the 69th percentile in Iowa and the 75th nationally (higher means more lead).
Nearby utilities
10 other systems share Tama County; 3 of them have a higher latest lead result than Montour Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Poweshiek Water Association | 13,920 | 0.6 ppb |
| Tama Water Supply | 3,130 | 4.8 ppb |
| Toledo Water Supply | 2,399 | 0 (not detected) |
| Traer Municipal Water Plant | 1,583 | 0 (not detected) |
| Dysart Water Supply | 1,281 | 0 (not detected) |
| Gladbrook Water Supply | 799 | 6 ppb |
| Garwin Water Supply | 481 | 0 (not detected) |
| Chelsea Water Supply | 229 | 2.6 ppb |
| Clutier Water Supply | 213 | 0 (not detected) |
| Elberon Water Supply | 184 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Montour, 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 Montour 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. Systems that went over once often dip back under; here is what that means.