Blue Lake Springs Mut Wtr, CA
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 15 ppb (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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
Blue Lake Springs Mut Wtr at a glance
Blue Lake Springs Mut Wtr serves about 4,822 people through 1,728 service connections, which makes it a medium-sized system under EPA's size classes. It is privately owned and draws surface water, in Calaveras County, California. EPA system ID: CA0510009; phone on file: 209-795-7030. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2024 (16 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Blue Lake Springs Mut Wtr is 16 ppb across 4 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 15 ppb over 10 |
| 2024 | 16 ppb over 15 |
| 2021 | 7.4 ppb |
| 2018 | 7 ppb |
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. Blue Lake Springs Mut Wtr's 15 ppb sits at the 99th percentile in California and the 99th nationally (higher means more lead).
Nearby utilities
18 other systems share Calaveras County; 1 of them has a higher latest lead result than Blue Lake Springs Mut Wtr. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ccwd - Ebbetts Pass | 11,545 | 1.85 ppb |
| Ccwd - Jenny Lind | 9,861 | 0 (not detected) |
| Calaveras Pud | 6,286 | 0 (not detected) |
| Ccwd - Copper Cove | 5,187 | 1.76 ppb |
| Union Public Utility District | 4,774 | 0 (not detected) |
| Angels, City Of | 3,836 | 0 (not detected) |
| Ccwd - West Point | 1,043 | 4.03 ppb |
| Valley Springs Pud | 900 | 0 (not detected) |
| Snowshoe Springs Assn. | 686 | 0 (not detected) |
| Ccwd - Wallace | 255 | 2.59 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Arnold, 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 Blue Lake Springs Mut Wtr 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. The lead result guide covers how utilities pick the homes they sample. This system is in the band the 2027 10 ppb rule changes.