Lower Rio Grande Pwwa High Valley, NM
Lead detected, under the action levels
Latest 90th-percentile lead: 5.8 ppb (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. 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
Lower Rio Grande Pwwa High Valley serves about 63 people through 24 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 Dona Ana County, New Mexico. EPA system ID: NM3513107; phone on file: 575-233-3947. 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 Lower Rio Grande Pwwa High Valley is 5.8 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 5.8 ppb |
How Lower Rio Grande Pwwa High Valley compares
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. Lower Rio Grande Pwwa High Valley's 5.8 ppb sits at the 89th percentile in New Mexico and the 92nd nationally (higher means more lead).
Other water systems in Dona Ana County
43 other systems share Dona Ana County; 1 of them has a higher latest lead result than Lower Rio Grande Pwwa High Valley. 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) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Anthony, 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 Lower Rio Grande Pwwa High Valley 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. Size matters more than most people expect: small vs large water systems.