Cs High Country Pines Water Company, MO
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 11 ppb (monitoring period 2025-2027). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
About Cs High Country Pines Water Company
Cs High Country Pines Water Company serves about 668 people through 261 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Navajo County, Missouri. EPA system ID: AZ0409329; phone on file: 602-698-9786. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2025 (10 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Cs High Country Pines Water Company is 11 ppb across 8 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2027 | 11 ppb over 10 |
| 2025 | 10 ppb |
| 2023 | 10 ppb |
| 2022 | 1 ppb |
| 2020 | 1 ppb |
| 2019 | 4.69 ppb |
| 2017 | 4.69 ppb |
| 2016 | 0 (not detected) |
Where this result ranks
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. Cs High Country Pines Water Company's 11 ppb sits at the 99th percentile in Missouri and the 98th nationally (higher means more lead).
Next steps for St. Louis, MO
Test your own tap with a certified lab first-draw sample; St. Louis, 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 Cs High Country Pines Water Company 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. This system is in the band the 2027 10 ppb rule changes.