Caballeros Water Company, AZ
Exceeded the action level in the past
Latest 90th-percentile lead: 3.7 ppb (monitoring period 2024-2024). 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.
Caballeros Water Company at a glance
Caballeros Water Company serves about 100 people through 63 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Maricopa County, Arizona. EPA system ID: AZ0407012; phone on file: 928-684-5484. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is up 3.7 ppb from 0 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Caballeros Water Company is 24 ppb across 8 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 3.7 ppb |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2022 | 24 ppb over 15 |
| 2021 | 0 (not detected) |
| 2020 | 24 ppb over 15 |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
Against other Arizona systems
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. Caballeros Water Company's 3.7 ppb sits at the 87th percentile in Arizona and the 86th nationally (higher means more lead).
Nearby utilities
99 other systems share Maricopa County; 10 of them have a higher latest lead result than Caballeros Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Phoenix City Of | 1,695,000 | 2.74 ppb |
| Mesa City Of | 466,000 | 5.01 ppb |
| Gilbert, Town Of | 247,600 | 0 (not detected) |
| Chandler City Of | 247,328 | 1.4 ppb |
| Scottsdale City Of | 241,361 | 2.3 ppb |
| Glendale City Of | 234,766 | 2.11 ppb |
| Peoria City Of | 187,676 | 0 (not detected) |
| Tempe City Of | 165,000 | 4.4 ppb |
| Epcor - Agua Fria | 128,040 | 0 (not detected) |
| Avondale City Of | 96,130 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Wickenburg, 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 Caballeros 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. What a 90th-percentile result does and does not tell you: how to read a lead result. More in what a past exceedance means today.