La Mesa Water Coop, NM
Lead detected, under the action levels
Latest 90th-percentile lead: 0.57 ppb (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. 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.
About La Mesa Water Coop
La Mesa Water Coop serves about 911 people through 330 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Sandoval County, New Mexico. EPA system ID: NM3500123; phone on file: 505-771-2330. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
The highest 90th-percentile result EPA holds for La Mesa Water Coop is 0.57 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2022 | 0.57 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. La Mesa Water Coop's 0.57 ppb sits at the 29th percentile in New Mexico and the 44th nationally (higher means more lead).
Neighbouring systems
27 other systems share Sandoval County; 22 of them have a higher latest lead result than La Mesa Water Coop. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Rio Rancho Water & Ww Services | 107,350 | 2 ppb |
| Bernalillo Water System | 11,810 | 1.4 ppb |
| Cuba Water System | 1,789 | 7.9 ppb |
| Jemez Springs Dwua | 1,385 | 6.8 ppb |
| Regina Mdwca | 705 | 0.6 ppb |
| Pena Blanca Water & Sanitation District | 700 | 3.3 ppb |
| North Ranchos De Placitas W&Sd | 659 | - |
| Las Acequias De Placitas | 596 | 1 ppb |
| Ponderosa Mdwca | 567 | 0 (not detected) |
| La Jara Water Users Association | 458 | 2.3 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Placitas, 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 La Mesa Water Coop 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. The action level is dropping - the 10 ppb rule from 2027.