Crescent Water Supply, IA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About Crescent Water Supply
Crescent Water Supply serves about 778 people through 368 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 surface water, in Pottawattamie County, Iowa. EPA system ID: IA7822086; phone on file: 402-344-4800. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 1.1 ppb from 1.1 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Crescent Water Supply is 1.1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 1.1 ppb |
| 2018 | 0 (not detected) |
How Crescent 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. Crescent Water Supply's reported as 0 (not detected) sits at the 22nd percentile in Iowa and the 25th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Pottawattamie County
14 other systems share Pottawattamie County; 10 of them have a higher latest lead result than Crescent Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Council Bluffs Water Works | 64,447 | 2 ppb |
| Carter Lake Water District | 3,791 | 3 ppb |
| Avoca Water Works | 1,697 | 0 (not detected) |
| Urban Bluffs - North | 1,558 | 2 ppb |
| Oakland Munic Water Utility | 1,524 | 1.3 ppb |
| Treynor Water Department | 1,049 | 5 ppb |
| Neola Light & Water | 906 | 4.4 ppb |
| Lakeside Estates Llc | 823 | 0 (not detected) |
| Walnut Municipal Utilities | 768 | 0 (not detected) |
| Carson Water Supply | 766 | 1 ppb |
What to do in your house
Look up your address in Crescent Water Supply's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Crescent 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. Small systems behave differently: why small systems go over more often.