Signal Peak Water Company, AZ
Lead detected, under the action levels
Latest 90th-percentile lead: 0.7 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.
Signal Peak Water Company at a glance
Signal Peak Water Company serves about 99 people through 37 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: AZ0411079; phone on file: 602-725-7960. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2020 (1.7 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Signal Peak Water Company is 1.7 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0.7 ppb |
| 2020 | 1.7 ppb |
| 2017 | 1.1 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. Signal Peak Water Company's 0.7 ppb sits at the 72nd percentile in Arizona and the 46th nationally (higher means more lead).
Nearby utilities
61 other systems share Pinal County; 12 of them have a higher latest lead result than Signal Peak Water Company. 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; Tempe, 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 Signal Peak 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. 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.