South San Ysidro Mdwca, NM
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2020-2022). 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
South San Ysidro Mdwca serves about 35 people through 16 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 San Miguel County, New Mexico. EPA system ID: NM3519225; phone on file: 575-421-3892. They can tell you what your service line is made of and whether they pay to replace it.
South San Ysidro Mdwca's lead record
The highest 90th-percentile result EPA holds for South San Ysidro Mdwca is 0 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2022 | 0 (not detected) |
Against other New Mexico systems
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. South San Ysidro Mdwca's reported as 0 (not detected) sits at the 0th percentile in New Mexico and the 1st nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
25 other systems share San Miguel County; 13 of them have a higher latest lead result than South San Ysidro 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 |
| Big Mesa Water Mdwca | 250 | 0 (not detected) |
| Ilfeld Mdwca | 249 | 0 (not detected) |
| Tecolotito Mdwca | 212 | 2 ppb |
| Sena Mdwca | 180 | - |
| La Pasada Mdwca | 164 | - |
Your move
Look up your address in South San Ysidro 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 South San Ysidro 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. The lead result guide covers how utilities pick the homes they sample. Small systems behave differently: why small systems go over more often.