Early Municipal Water Supply, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.8 ppb (monitoring period 2026-2026). 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 Early Municipal Water Supply
Early Municipal Water Supply serves about 587 people through 349 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 Sac County, Iowa. EPA system ID: IA8114000; phone on file: 712-660-0222. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2025 (1.3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Early Municipal Water Supply is 11 ppb across 7 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.8 ppb |
| 2025 | 1.3 ppb |
| 2024 | 3 ppb |
| 2024 | 1.9 ppb |
| 2023 | 3.7 ppb |
| 2020 | 11 ppb over 10 |
| 2017 | 8 ppb |
How Early Municipal 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. Early Municipal Water Supply's 1.8 ppb sits at the 56th percentile in Iowa and the 67th nationally (higher means more lead).
Other water systems in Sac County
7 other systems share Sac County; 4 of them have a higher latest lead result than Early Municipal Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sac City Municipal Water Plant | 2,093 | 0 (not detected) |
| West Central Rwa-Boyer System | 1,715 | 1.7 ppb |
| Lake View Water Supply | 1,133 | 4.6 ppb |
| Odebolt Water Supply | 994 | 4.8 ppb |
| Wall Lake Water Supply | 780 | 2.3 ppb |
| Schaller Water Supply | 729 | 0.7 ppb |
| Auburn Water Supply | 265 | 2.4 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Early, 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 Early 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. 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.