A1 Ranch Dwid, AZ
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2025-2025). 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 A1 Ranch Dwid
A1 Ranch Dwid serves about 45 people through 24 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Coconino County, Arizona. EPA system ID: AZ0403087; phone on file: 928-773-0690. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for A1 Ranch Dwid is 0 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2022 | 0 (not detected) |
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. A1 Ranch Dwid's reported as 0 (not detected) sits at the 3rd percentile in Arizona and the 3rd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
32 other systems share Coconino County; 8 of them have a higher latest lead result than A1 Ranch Dwid. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Flagstaff City Of | 79,796 | 3.6 ppb |
| Grand Canyon National Park | 16,590 | 0 (not detected) |
| Arizona Water Co - Sedona | 12,104 | 6 ppb |
| Doney Park Water | 9,222 | 0 (not detected) |
| Arizona Water Co - Pinewood | 8,115 | 0 (not detected) |
| Page City Of | 7,445 | 0 (not detected) |
| Kachina Village Dwid | 3,500 | 0 (not detected) |
| Williams City Of | 3,145 | 8.6 ppb |
| Blue Ridge Dwid | 1,920 | 0 (not detected) |
| Forest Lakes Water Improvement District | 1,746 | 5.9 ppb |
Next steps for Flagstaff, AZ
Look up your address in A1 Ranch Dwid'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 A1 Ranch Dwid 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. Small systems behave differently: why small systems go over more often.