Coldwater Canyon 1, AZ
Exceeded the action level in the past
Latest 90th-percentile lead: 7.9 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. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
Coldwater Canyon 1 serves about 541 people through 242 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Yavapai County, Arizona. EPA system ID: AZ0413020; phone on file: 520-623-5172. They can tell you what your service line is made of and whether they pay to replace it.
Coldwater Canyon 1's lead record
That is down 42.1 ppb from 50 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Coldwater Canyon 1 is 50 ppb across 10 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 7.9 ppb |
| 2025 | 50 ppb over 15 |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2016 | 2.2 ppb |
| 2016 | 2.2 ppb |
How Coldwater Canyon 1 compares
Of the 730 Arizona systems with a lead result, the median latest reading is 0 ppb; 9 are over 15 ppb right now and 58 have gone over at some point. Coldwater Canyon 1's 7.9 ppb sits at the 95th percentile in Arizona and the 96th nationally (higher means more lead).
Nearby utilities
100 other systems share Yavapai County; 8 of them have a higher latest lead result than Coldwater Canyon 1. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Town Of Prescott Valley | 57,048 | 0 (not detected) |
| Prescott City Of | 42,217 | 0 (not detected) |
| Cottonwood Municipal Water Cw1 | 11,288 | 0 (not detected) |
| Big Park Water Company | 7,392 | 0 (not detected) |
| Town Of Camp Verde Utilities | 5,380 | 0 (not detected) |
| Clarkdale Municipal Water System | 5,201 | 0 (not detected) |
| Cottonwood Municipal Water Vv6 | 4,518 | 18 ppb |
| Cordes Lakes Water Company | 4,425 | 4.1 ppb |
| Arizona Water Co - Rimrock | 3,532 | 0 (not detected) |
| Freeport Mcmoran Bagdad Town | 3,200 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Tucson, AZ 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 Coldwater Canyon 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. Why sampled homes are the worst-case ones is in the guide to reading the number. More in what a past exceedance means today.