Canyon Improvement & Service District, WY
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2026-2026). 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
Canyon Improvement & Service District serves about 79 people through 26 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Weston County, Wyoming. EPA system ID: WY5601632; phone on file: 307-312-0768. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 3 ppb from 4 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Canyon Improvement & Service District is 8 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2025 | 4 ppb |
| 2024 | 8 ppb |
| 2020 | 2 ppb |
| 2017 | 1 ppb |
Against other Wyoming systems
Of the 311 Wyoming systems with a lead result, the median latest reading is 1 ppb; 0 are over 15 ppb right now and 16 have gone over at some point. Canyon Improvement & Service District's 1 ppb sits at the 36th percentile in Wyoming and the 51st nationally (higher means more lead).
Neighbouring systems
8 other systems share Weston County; 2 of them have a higher latest lead result than Canyon Improvement & Service District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Newcastle, City Of | 3,595 | 1 ppb |
| Upton, Town Of | 1,100 | 4 ppb |
| Salt Creek Water District | 600 | 0 (not detected) |
| West End Water District | 225 | 1 ppb |
| Osage Water District | 200 | 3 ppb |
| Cambria I&S District | 148 | 0 (not detected) |
| Water Unlimited, Incorporated | 144 | 0 (not detected) |
| Sunset Ranch Water District | 70 | 0 (not detected) |
Next steps for Newcastle, WY
Test your own tap with a certified lab first-draw sample; Newcastle, WY 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 Canyon Improvement & Service District 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. The action level is dropping - the 10 ppb rule from 2027.