Dolphin Isle Marina, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About Dolphin Isle Marina
Dolphin Isle Marina serves about 280 people through 86 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Mendocino County, California. EPA system ID: CA2300743; phone on file: 707-964-4113. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Dolphin Isle Marina's lead record
Against the period ending 2021 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Dolphin Isle Marina is 0 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
Where this result ranks
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. Dolphin Isle Marina's reported as 0 (not detected) sits at the 31st percentile in California and the 18th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
40 other systems share Mendocino County; 6 of them have a higher latest lead result than Dolphin Isle Marina. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ukiah, City Of | 16,067 | 0 (not detected) |
| Fort Bragg, City Of | 7,117 | 0 (not detected) |
| Willits, City Of | 6,175 | 0 (not detected) |
| Millview County Water District | 5,500 | 0 (not detected) |
| Redwood Valley County Water District | 5,200 | 0 (not detected) |
| Willow County Water District | 3,797 | 0 (not detected) |
| Brooktrails Township Csd | 3,632 | 0 (not detected) |
| North Gualala Water Company | 3,508 | 0 (not detected) |
| Rogina Water Company Inc. | 2,554 | 0 (not detected) |
| Laytonville County Water District | 1,152 | 0 (not detected) |
What to do in your house
Look up your address in Dolphin Isle Marina's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Dolphin Isle Marina 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. Small systems behave differently: why small systems go over more often.