Mountain Meadows Mwc, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 4.4 ppb (monitoring period 2019-2021). 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 Mountain Meadows Mwc
Mountain Meadows Mwc serves about 525 people through 123 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Mono County, California. EPA system ID: CA2600620; phone on file: 760-920-2328. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Mountain Meadows Mwc's lead record
That is down 1.8 ppb from 6.2 ppb in the period ending 2018. The highest 90th-percentile result EPA holds for Mountain Meadows Mwc is 6.2 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2021 | 4.4 ppb |
| 2018 | 6.2 ppb |
| 2017 | 0 (not detected) |
How Mountain Meadows Mwc compares
Of the 2,884 California systems with a lead result, the median latest reading is 0 ppb; 30 are over 15 ppb right now and 215 have gone over at some point. Mountain Meadows Mwc's 4.4 ppb sits at the 91st percentile in California and the 89th nationally (higher means more lead).
Other water systems in Mono County
17 other systems share Mono County; 3 of them have a higher latest lead result than Mountain Meadows Mwc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mammoth Cwd | 8,234 | 1.5 ppb |
| Usmc - Housing Coleville | 424 | 1.3 ppb |
| Bridgeport Pud | 374 | 1.9 ppb |
| Lower Rock Creek Mutual Water Co. | 310 | 0 (not detected) |
| June Lake Pud - Down Canyon | 310 | 2 ppb |
| Usmc/Mtn Warfare Trng Ctr - Bridgeport | 300 | 1 ppb |
| June Lake Pud Village | 263 | 2.7 ppb |
| Crowley Lake Trailer Park | 230 | 9.4 ppb |
| Lee Vining Public Utility District | 222 | 8 ppb |
| Lundy Mutual Water Company | 200 | 3.7 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Mammoth Lakes, CA 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 Mountain Meadows Mwc 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Size matters more than most people expect: small vs large water systems.