Mesilla Water System, NM
Lead detected, under the action levels
Latest 90th-percentile lead: 2.9 ppb (monitoring period 2022-2024). 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.
Mesilla Water System at a glance
Mesilla Water System serves about 2,167 people through 827 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Dona Ana County, New Mexico. EPA system ID: NM3560007; phone on file: 575-993-2322. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Mesilla Water System's lead record
Against the period ending 2022 (3.1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Mesilla Water System is 3.1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2.9 ppb |
| 2022 | 3.1 ppb |
| 2018 | 1.6 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. Mesilla Water System's 2.9 ppb sits at the 74th percentile in New Mexico and the 80th nationally (higher means more lead).
Neighbouring systems
43 other systems share Dona Ana County; 5 of them have a higher latest lead result than Mesilla Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Las Cruces Municipal Water System | 98,175 | 2 ppb |
| New Mexico State University | 24,000 | 4 ppb |
| Camino Real Regional Utility Authority | 21,930 | 5 ppb |
| Dona Ana Mdwca | 16,987 | 1.9 ppb |
| Lake Section Water Company | 14,619 | 0 (not detected) |
| Moongate West | 13,362 | 0.56 ppb |
| Lower Rio Grande Pwwa South Valley | 11,542 | 0.31 ppb |
| Moongate Water System | 9,170 | 0.51 ppb |
| Anthony W&Sd | 8,691 | 2 ppb |
| University Estates Water System (Lcu) | 5,292 | 0 (not detected) |
Next steps for Mesilla, NM
Test your own tap with a certified lab first-draw sample; Mesilla, 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 Mesilla Water System 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Systems that went over once often dip back under; here is what that means.