Callaway County Pwsd 1, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 4.06 ppb (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. 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.
Who runs the water here
Callaway County Pwsd 1 serves about 9,840 people through 4,659 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Callaway County, Missouri. EPA system ID: MO3024084; phone on file: 573-896-4788. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is up 1.06 ppb from 3 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Callaway County Pwsd 1 is 4.06 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 4.06 ppb |
| 2022 | 3 ppb |
| 2021 | 3 ppb |
| 2021 | 3 ppb |
| 2019 | 3.38 ppb |
| 2018 | 3.38 ppb |
| 2018 | 3.38 ppb |
| 2016 | 3.45 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. Callaway County Pwsd 1's 4.06 ppb sits at the 88th percentile in Missouri and the 88th nationally (higher means more lead).
Other water systems in Callaway County
9 other systems share Callaway County; 0 of them have a higher latest lead result than Callaway County Pwsd 1. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Callaway 2 Water District | 13,080 | 1.77 ppb |
| Fulton Pws | 12,600 | 3.98 ppb |
| Auxvasse Pws | 1,001 | 3.03 ppb |
| New Bloomfield Pws | 669 | 2.54 ppb |
| Seges Mhp | 285 | 0 (not detected) |
| Mokane Pws | 208 | 0 (not detected) |
| Kingdom City Pws | 128 | 0.66 ppb |
| Mo American Jefferson City North | 95 | 2 ppb |
| Wildwood Lot Owners Assn | 78 | 2.07 ppb |
Next steps for Holts Summit, MO
Test your own tap with a certified lab first-draw sample; Holts Summit, 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 Callaway County Pwsd 1 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. Size matters more than most people expect: small vs large water systems.