Adoc Eyman Unit, AZ
Lead detected, under the action levels
Latest 90th-percentile lead: 1.3 ppb (monitoring period 2021-2023). 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.
Adoc Eyman Unit at a glance
Adoc Eyman Unit serves about 3,969 people through 11 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by the state and draws groundwater, in Pinal County, Arizona. EPA system ID: AZ0411705; phone on file: 602-818-9018. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2023 (1.3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Adoc Eyman Unit is 4.5 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.3 ppb |
| 2023 | 1.3 ppb |
| 2022 | 1.4 ppb |
| 2020 | 2.5 ppb |
| 2020 | 3 ppb |
| 2017 | 4.5 ppb |
| 2016 | 2.1 ppb |
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. Adoc Eyman Unit's 1.3 ppb sits at the 77th percentile in Arizona and the 61st nationally (higher means more lead).
Other water systems in Pinal County
61 other systems share Pinal County; 11 of them have a higher latest lead result than Adoc Eyman Unit. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Arizona Water Co - Pinal Valley | 134,432 | 0 (not detected) |
| Epcor - San Tan | 87,435 | 0 (not detected) |
| Gw Santa Cruz Water Co | 84,000 | 0 (not detected) |
| Arizona Water Co - Apache Junction | 62,055 | 0 (not detected) |
| Lago Del Oro Water Company | 18,132 | 0 (not detected) |
| Apache Junction Water District | 15,610 | 0 (not detected) |
| Florence Water Company | 14,593 | 0 (not detected) |
| Arizona Water Co - Oracle | 10,585 | 0 (not detected) |
| Epcor - San Tan Anthem | 10,362 | 0 (not detected) |
| Eloy City Of | 8,999 | 1.8 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Phoenix, 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 Adoc Eyman Unit 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. Size matters more than most people expect: small vs large water systems.