Monte Vista Water Company, AZ
Lead detected, under the action levels
Latest 90th-percentile lead: 4.6 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.
Monte Vista Water Company at a glance
Monte Vista Water Company serves about 150 people through 50 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Cochise County, Arizona. EPA system ID: AZ0402043; phone on file: 520-368-1849. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Monte Vista Water Company's lead record
That is up 4.6 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Monte Vista Water Company is 4.6 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4.6 ppb |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2018 | 3 ppb |
How Monte Vista Water Company 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. Monte Vista Water Company's 4.6 ppb sits at the 90th percentile in Arizona and the 90th nationally (higher means more lead).
Other water systems in Cochise County
49 other systems share Cochise County; 5 of them have a higher latest lead result than Monte Vista Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Bella Vista City Water System | 20,045 | 0 (not detected) |
| Douglas City Of | 16,656 | 0 (not detected) |
| Us Army Fort Huachuca | 15,603 | 0 (not detected) |
| Pueblo Del Sol Water Company | 12,804 | 0 (not detected) |
| Arizona Water Co - Sierra Vista | 9,233 | 0 (not detected) |
| Arizona Water Co - Bisbee | 8,590 | 0 (not detected) |
| Benson, City Of Water System | 5,355 | 0 (not detected) |
| City Of Willcox | 3,236 | 0 (not detected) |
| St David Dwid | 2,192 | 0 (not detected) |
| Bella Vista Water South | 2,178 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Douglas, 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 Monte Vista 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.