Big Mesa Water Mdwca, NM
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 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.
Who runs the water here
Big Mesa Water Mdwca serves about 250 people through 572 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 surface water, in San Miguel County, New Mexico. EPA system ID: NM3573725; phone on file: 575-868-4550. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Big Mesa Water Mdwca's lead record
Against the period ending 2017 (0.38 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Big Mesa Water Mdwca is 0.38 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2017 | 0.38 ppb |
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. Big Mesa Water Mdwca's reported as 0 (not detected) sits at the 14th percentile in New Mexico and the 17th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in San Miguel County
25 other systems share San Miguel County; 13 of them have a higher latest lead result than Big Mesa Water Mdwca. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Las Vegas (City Of) | 14,530 | 1.7 ppb |
| Pecos Water System | 2,133 | 8.4 ppb |
| Pendaries Mdwca | 500 | 1.5 ppb |
| East Pecos Mdwca | 413 | 1.1 ppb |
| Villanueva Mdwca | 268 | 2 ppb |
| Ilfeld Mdwca | 249 | 0 (not detected) |
| Tecolotito Mdwca | 212 | 2 ppb |
| Sena Mdwca | 180 | - |
| La Pasada Mdwca | 164 | - |
| San Juan Mdwca | 136 | 0 (not detected) |
What to do in your house
Look up your address in Big Mesa Water Mdwca'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 Big Mesa Water Mdwca 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. Small systems behave differently: why small systems go over more often.