North San Ysidro Mdwca, NM
Lead detected, under the action levels
Latest 90th-percentile lead: 0.67 ppb (monitoring period 2018-2020). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
North San Ysidro Mdwca serves about 133 people through 45 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: NM3518225; phone on file: 505-470-6742. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2016 (0.8 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for North San Ysidro Mdwca is 0.8 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2020 | 0.67 ppb |
| 2016 | 0.8 ppb |
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. North San Ysidro Mdwca's 0.67 ppb sits at the 31st percentile in New Mexico and the 46th nationally (higher means more lead).
Nearby utilities
25 other systems share San Miguel County; 12 of them have a higher latest lead result than North 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 | - |
What to do in your house
Test your own tap with a certified lab first-draw sample; Ilfeld, 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 North 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. Size matters more than most people expect: small vs large water systems.