C-Oasis Park, NM
Lead detected, under the action levels
Latest 90th-percentile lead: 7 ppb (monitoring period 2023-2025). 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 C-Oasis Park
C-Oasis Park serves about 54 people through 27 service connections, which makes it a very small system under EPA's size classes. It is under mixed public and private ownership and draws groundwater, in Yavapai County, New Mexico. EPA system ID: AZ0413423; phone on file: 505-881-8200. Call that number and ask whether your address has a lead, galvanized or unknown service line.
C-Oasis Park's lead record
That is up 7 ppb from 0 ppb in the period ending 2019. The highest 90th-percentile result EPA holds for C-Oasis Park is 7 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 7 ppb |
| 2019 | 0 (not detected) |
| 2016 | 4.6 ppb |
How C-Oasis Park 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. C-Oasis Park's 7 ppb sits at the 92nd percentile in New Mexico and the 95th nationally (higher means more lead).
What to do in your house
Test your own tap with a certified lab first-draw sample; Albuqueque, 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 C-Oasis Park 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.