Gw Santa Cruz Water -Twin Hawks Water, AZ
Lead detected, under the action levels
Latest 90th-percentile lead: 3.5 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. 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.
Who runs the water here
Gw Santa Cruz Water -Twin Hawks Water serves about 64 people through 20 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Pinal County, Arizona. EPA system ID: AZ0411460; phone on file: 480-328-9281. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is up 2.1 ppb from 1.4 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Gw Santa Cruz Water -Twin Hawks Water is 3.5 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 3.5 ppb |
| 2023 | 1.4 ppb |
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. Gw Santa Cruz Water -Twin Hawks Water's 3.5 ppb sits at the 86th percentile in Arizona and the 85th nationally (higher means more lead).
Neighbouring systems
61 other systems share Pinal County; 4 of them have a higher latest lead result than Gw Santa Cruz Water -Twin Hawks Water. 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 |
Next steps for Maricopa, AZ
Test your own tap with a certified lab first-draw sample; Maricopa, 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 Gw Santa Cruz Water -Twin Hawks Water 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. The action level is dropping - the 10 ppb rule from 2027.