Causey Water System, NM
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2026-2026). 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
Causey Water System serves about 80 people through 32 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 Roosevelt County, New Mexico. EPA system ID: NM3528122; phone on file: 575-273-4249. They can tell you what your service line is made of and whether they pay to replace it.
Causey Water System's lead record
Against the period ending 2025 (0.9 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Causey Water System is 1 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2025 | 0.9 ppb |
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 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. Causey Water System's 1 ppb sits at the 37th percentile in New Mexico and the 51st nationally (higher means more lead).
Other water systems in Roosevelt County
5 other systems share Roosevelt County; 1 of them has a higher latest lead result than Causey Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Portales Water System | 14,284 | 0 (not detected) |
| Roosevelt County Wua | 3,720 | 0 (not detected) |
| Elida Water System | 273 | 0.41 ppb |
| Dora Water System | 161 | 1.1 ppb |
| Floyd Ws Village Of | 101 | 0.64 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Causey, 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 Causey 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. Size matters more than most people expect: small vs large water systems.