Clay Springs Dwid, AZ
Exceeded the action level in the past
Latest 90th-percentile lead: 2.8 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. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
Clay Springs Dwid serves about 425 people through 170 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Navajo County, Arizona. EPA system ID: AZ0409009; phone on file: 928-367-6621. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is up 2.8 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Clay Springs Dwid is 40 ppb across 8 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.8 ppb |
| 2022 | 0 (not detected) |
| 2019 | 2.7 ppb |
| 2018 | 6 ppb |
| 2017 | 1.6 ppb |
| 2017 | 40 ppb over 15 |
| 2017 | 3.9 ppb |
| 2016 | 40 ppb over 15 |
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. Clay Springs Dwid's 2.8 ppb sits at the 84th percentile in Arizona and the 80th nationally (higher means more lead).
Nearby utilities
39 other systems share Navajo County; 8 of them have a higher latest lead result than Clay Springs Dwid. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Show Low | 17,139 | 0 (not detected) |
| Arizona Water Co - Overgaard | 13,797 | 0 (not detected) |
| Arizona Water Co - Lakeside | 12,191 | 7.8 ppb |
| Winslow City Of | 9,789 | 0 (not detected) |
| Snowflake Town Of | 5,590 | 1.7 ppb |
| Ponderosa Dwid | 5,375 | 0 (not detected) |
| Holbrook City Of | 4,833 | 0 (not detected) |
| Town Of Taylor | 4,190 | 0 (not detected) |
| Arizona Water Co - Pinetop Lakes | 3,558 | 0 (not detected) |
| Pinetop Water Community Facilities Dist | 3,250 | 10 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Lakeside, 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 Clay Springs 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Why an old exceedance still matters: over the limit before, under it now.