Epcor - Rio Lindo, AZ
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2023). 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.
Epcor - Rio Lindo at a glance
Epcor - Rio Lindo serves about 79 people through 36 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in La Paz County, Arizona. EPA system ID: AZ0415040; phone on file: 623-445-2431. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Epcor - Rio Lindo is 29 ppb across 7 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2018 | 29 ppb over 15 |
| 2018 | 1.8 ppb |
| 2017 | 29 ppb over 15 |
Where this result ranks
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. Epcor - Rio Lindo's reported as 0 (not detected) sits at the 10th percentile in Arizona and the 7th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in La Paz County
18 other systems share La Paz County; 5 of them have a higher latest lead result than Epcor - Rio Lindo. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Quartzsite Town Of | 2,761 | 9.9 ppb |
| Epcor - Lakeside | 1,775 | 0 (not detected) |
| Epcor - Moovalya Keys | 1,298 | 6.2 ppb |
| Ehrenberg Improvement District | 989 | 1.5 ppb |
| Epcor - Holiday Harbor | 559 | 0 (not detected) |
| Epcor - Marina Village | 528 | 0 (not detected) |
| 88 Shades Rv Park | 488 | 0 (not detected) |
| Hillcrest Water Company | 459 | 6 ppb |
| Q Mountain Vista Mhp | 440 | 2.9 ppb |
| Epcor - Parker Dam | 429 | 0 (not detected) |
Next steps for El Mirage, AZ
Test your own tap with a certified lab first-draw sample; El Mirage, 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 Epcor - Rio Lindo 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. Why an old exceedance still matters: over the limit before, under it now.