Yah Ta Hey W & Sd, NM
Exceeded the action level in the past
Latest 90th-percentile lead: 1.4 ppb (monitoring period 2026-2026). 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.
About Yah Ta Hey W & Sd
Yah Ta Hey W & Sd serves about 435 people through 128 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Mckinley County, New Mexico. EPA system ID: NM3532717; phone on file: 505-728-4292. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Yah Ta Hey W & Sd's lead record
Against the period ending 2025 (2.4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Yah Ta Hey W & Sd is 22 ppb across 6 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.4 ppb |
| 2025 | 2.4 ppb |
| 2025 | 4.2 ppb |
| 2024 | 0.72 ppb |
| 2024 | 1.1 ppb |
| 2022 | 22 ppb over 15 |
Where this result ranks
Of the 504 New Mexico systems with a lead result, the median latest reading is 1.4 ppb; 14 are over 15 ppb right now and 46 have gone over at some point. Yah Ta Hey W & Sd's 1.4 ppb sits at the 51st percentile in New Mexico and the 62nd nationally (higher means more lead).
Other water systems in Mckinley County
14 other systems share Mckinley County; 8 of them have a higher latest lead result than Yah Ta Hey W & Sd. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Gallup Water System | 20,880 | 0 (not detected) |
| Gamerco Water & Sanitation | 1,744 | 8.3 ppb |
| Thoreau Water & Sanitation District | 1,173 | 1.2 ppb |
| Ramah Water & Sanitation District | 517 | 1.5 ppb |
| Whispering Cedars Water Association | 425 | 2 ppb |
| White Cliffs Mdwua | 323 | 2 ppb |
| Top Of The World Water Association Corp | 177 | 0 (not detected) |
| Bluewater Lake Mdwca | 135 | 5.3 ppb |
| Coal Basin Dwua | 116 | 10 ppb |
| D & S Trailer Ranch | 109 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Yah-Tah-Hey, NM 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 Yah Ta Hey W & Sd 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. Why an old exceedance still matters: over the limit before, under it now.