Holcomb Pws, MO
Exceeded the action level in the past
Latest 90th-percentile lead: 1.8 ppb (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Holcomb Pws
Holcomb Pws serves about 635 people through 342 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 Dunklin County, Missouri. EPA system ID: MO4010370; phone on file: 573-792-3610. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 1.02 ppb from 2.82 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Holcomb Pws is 15.5 ppb across 7 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.8 ppb |
| 2022 | 2.82 ppb |
| 2022 | 2.31 ppb |
| 2019 | 15.5 ppb over 15 |
| 2019 | 15.5 ppb over 15 |
| 2016 | 2.8 ppb |
| 2016 | 2.8 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. Holcomb Pws's 1.8 ppb sits at the 67th percentile in Missouri and the 67th nationally (higher means more lead).
Neighbouring systems
11 other systems share Dunklin County; 2 of them have a higher latest lead result than Holcomb Pws. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Kennett Pws | 10,200 | 1.12 ppb |
| Dunklin County Pwsd 1 | 4,307 | 1.66 ppb |
| Malden Pws | 3,700 | 2.46 ppb |
| Dunklin County Pwsd 2 | 2,900 | 1.41 ppb |
| Campbell Pws | 1,992 | 1.4 ppb |
| Dunklin County Pwsd 3 South | 1,972 | 0 (not detected) |
| Senath Pws | 1,767 | 5.48 ppb |
| Clarkton Pws | 1,124 | 1.25 ppb |
| Cardwell Pws | 533 | 1.57 ppb |
| Hornersville Pws | 526 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Holcomb, MO 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 Holcomb 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. More in what a past exceedance means today.