Cottonwood Mhp, AZ

Above the federal action level

Latest 90th-percentile lead: 42 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. In the most recent monitoring period, more than 10% of the sampled homes measured above 15 ppb. Use a filter certified to NSF/ANSI 53 for lead for drinking and cooking now, and test your own tap.

About Cottonwood Mhp

Cottonwood Mhp serves about 140 people through 91 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater. EPA system ID: NV0000017; phone on file: 602-315-2270. Call that number and ask whether your address has a lead, galvanized or unknown service line.

Every lead result on file

That is up 35 ppb from 7 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Cottonwood Mhp is 42 ppb across 4 monitoring periods, 1 of them over the 15 ppb action level.

Against other Arizona systems

Of the 730 Arizona systems with a lead result, the median latest reading is 0 ppb; 9 are over 15 ppb right now and 58 have gone over at some point. Cottonwood Mhp's 42 ppb sits at the 100th percentile in Arizona and the 100th nationally (higher means more lead).

Next steps for Phoenix, AZ

Use a filter certified to NSF/ANSI 53 for lead on the tap you drink and cook from, now, before you test. Then test your own tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Cottonwood Mhp 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. The action level is dropping - the 10 ppb rule from 2027.