Lake Mahopac Condo, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 3.95 ppb (monitoring period 2020-2022). 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
Lake Mahopac Condo serves about 75 people through 46 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Putnam County, California. EPA system ID: NY3920317; phone on file: 949-500-9112. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2022 (4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Lake Mahopac Condo is 4 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2022 | 3.95 ppb |
| 2022 | 4 ppb |
How Lake Mahopac Condo 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. Lake Mahopac Condo's 3.95 ppb sits at the 89th percentile in California and the 87th nationally (higher means more lead).
Next steps for Newport Beach, CA
Test your own tap with a certified lab first-draw sample; Newport Beach, 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 Lake Mahopac Condo 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.