Harper Water Supply, IA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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 Harper Water Supply
Harper Water Supply serves about 118 people through 62 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 surface water, in Keokuk County, Iowa. EPA system ID: IA5428031; phone on file: 563-299-2214. They can tell you what your service line is made of and whether they pay to replace it.
Harper Water Supply's lead record
Against the period ending 2020 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Harper Water Supply is 0 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2017 | 0 (not detected) |
How Harper 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. Harper Water Supply's reported as 0 (not detected) sits at the 6th percentile in Iowa and the 11th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
9 other systems share Keokuk County; 7 of them have a higher latest lead result than Harper Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sigourney Muni Water Works | 2,004 | 1.84 ppb |
| Keota Water Dept | 897 | 0 (not detected) |
| Hedrick Water Supply | 728 | 0 (not detected) |
| What Cheer Water Supply | 646 | 2.1 ppb |
| Richland Water Supply | 542 | 2 ppb |
| Delta Water Supply | 264 | 3.4 ppb |
| Keswick Water System | 252 | 6 ppb |
| South English Water Supply | 238 | 1 ppb |
| Webster Municipal Water Works | 96 | 2 ppb |
Your move
Look up your address in Harper 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 Harper 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. The lead result guide covers how utilities pick the homes they sample. A zero today does not rule out a jump later - the rules are tightening in 2027.