Calhoun Pws, MO
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 Calhoun Pws
Calhoun Pws serves about 324 people through 163 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 Henry County, Missouri. EPA system ID: MO1010123; phone on file: 660-694-3634. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Calhoun Pws's lead record
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Calhoun Pws is 0.62 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2016 | 0.62 ppb |
Against other Missouri systems
Of the 1,674 Missouri systems with a lead result, the median latest reading is 1.04 ppb; 2 are over 15 ppb right now and 74 have gone over at some point. Calhoun Pws's reported as 0 (not detected) sits at the 19th percentile in Missouri and the 19th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Henry County
10 other systems share Henry County; 5 of them have a higher latest lead result than Calhoun Pws. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Henry County Water Company | 11,373 | 3.37 ppb |
| Henry County Pwsd 3 | 2,993 | 0 (not detected) |
| Windsor Pws | 2,900 | 0 (not detected) |
| Henry County Pwsd 4 | 1,140 | 1.23 ppb |
| Urich Pws | 505 | 0 (not detected) |
| Deepwater Pws | 433 | 1.49 ppb |
| Montrose Pws | 384 | 0 (not detected) |
| Henry County Pwsd 1 | 258 | 2.44 ppb |
| Blairstown Pws | 123 | 0.72 ppb |
| Oakwood Water Assn | 28 | 0 (not detected) |
What to do in your house
Look up your address in Calhoun Pws'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 Calhoun Pws 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. Small systems behave differently: why small systems go over more often.