Berneil Water Company, AZ
Lead detected, under the action levels
Latest 90th-percentile lead: 6.9 ppb (monitoring period 2023-2025). 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
Berneil Water Company serves about 1,388 people through 553 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Maricopa County, Arizona. EPA system ID: AZ0407008; phone on file: 520-624-1460. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is up 6.9 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Berneil Water Company is 13 ppb across 4 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 6.9 ppb |
| 2022 | 0 (not detected) |
| 2019 | 7.8 ppb |
| 2016 | 13 ppb over 10 |
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. Berneil Water Company's 6.9 ppb sits at the 94th percentile in Arizona and the 94th nationally (higher means more lead).
Other water systems in Maricopa County
99 other systems share Maricopa County; 3 of them have a higher latest lead result than Berneil Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Phoenix City Of | 1,695,000 | 2.74 ppb |
| Mesa City Of | 466,000 | 5.01 ppb |
| Gilbert, Town Of | 247,600 | 0 (not detected) |
| Chandler City Of | 247,328 | 1.4 ppb |
| Scottsdale City Of | 241,361 | 2.3 ppb |
| Glendale City Of | 234,766 | 2.11 ppb |
| Peoria City Of | 187,676 | 0 (not detected) |
| Tempe City Of | 165,000 | 4.4 ppb |
| Epcor - Agua Fria | 128,040 | 0 (not detected) |
| Avondale City Of | 96,130 | 0 (not detected) |
What to do in your house
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 Berneil 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.