Arizona Water Co - Tierra Grande, AZ
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About Arizona Water Co - Tierra Grande
Arizona Water Co - Tierra Grande serves about 1,819 people through 384 service connections, which makes it a small system under EPA's size classes. It is under mixed public and private ownership and draws groundwater, in Pinal County, Arizona. EPA system ID: AZ0411076; phone on file: 602-206-3765. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 9.1 ppb from 9.1 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Arizona Water Co - Tierra Grande is 9.1 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 9.1 ppb |
| 2018 | 0 (not detected) |
| 2017 | 2.9 ppb |
How Arizona Water Co - Tierra Grande 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. Arizona Water Co - Tierra Grande's reported as 0 (not detected) sits at the 49th percentile in Arizona and the 30th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Pinal County
61 other systems share Pinal County; 16 of them have a higher latest lead result than Arizona Water Co - Tierra Grande. 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
Look up your address in Arizona Water Co - Tierra Grande's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Arizona Water Co - Tierra Grande 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. A zero today does not rule out a jump later - the rules are tightening in 2027.