Cs Water Company, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1.1 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. 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
Cs Water Company serves about 258 people through 106 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Mohave County, Missouri. EPA system ID: AZ0408072; phone on file: 602-698-9786. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Cs Water Company's lead record
Against the period ending 2022 (0.5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Cs Water Company is 6 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.1 ppb |
| 2022 | 0.5 ppb |
| 2020 | 2.3 ppb |
| 2017 | 6 ppb |
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 Water Company's 1.1 ppb sits at the 51st percentile in Missouri and the 57th nationally (higher means more lead).
Neighbouring systems
2 other systems share Mohave County; 0 of them have a higher latest lead result than Cs Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cs White Hills Water Company Unit 1 | 338 | 0 (not detected) |
| Cs White Hills Water Company Units 3 4 6 | 333 | 0.7 ppb |
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 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.