Cannon Pwsd 1, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 4.82 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.
Cannon Pwsd 1 at a glance
Cannon Pwsd 1 serves about 6,482 people through 3,182 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 surface water, in Ralls County, Missouri. EPA system ID: MO2024500; phone on file: 573-565-2656. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 1.25 ppb from 6.07 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Cannon Pwsd 1 is 7.84 ppb across 10 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4.82 ppb |
| 2024 | 6.07 ppb |
| 2023 | 4.82 ppb |
| 2022 | 4.08 ppb |
| 2020 | 4.08 ppb |
| 2020 | 4.08 ppb |
| 2019 | 4.43 ppb |
| 2017 | 4.43 ppb |
| 2017 | 4.35 ppb |
| 2016 | 7.84 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. Cannon Pwsd 1's 4.82 ppb sits at the 91st percentile in Missouri and the 90th nationally (higher means more lead).
Other water systems in Ralls County
3 other systems share Ralls County; 1 of them has a higher latest lead result than Cannon Pwsd 1. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ralls County Pwsd 1 | 7,662 | 0 (not detected) |
| New London Pws | 975 | 5.41 ppb |
| Perry Pws | 694 | 3.47 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Perry, 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 Cannon 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. 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.