Grizzly Lake Csd-Delleker, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). 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 Grizzly Lake Csd-Delleker
Grizzly Lake Csd-Delleker serves about 657 people through 208 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Plumas County, California. EPA system ID: CA3200104; phone on file: 530-832-5225. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 13 ppb from 13 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Grizzly Lake Csd-Delleker is 13 ppb across 4 monitoring periods, none of them over 15 ppb (2 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 13 ppb over 10 |
| 2019 | 8.5 ppb |
| 2016 | 11 ppb over 10 |
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. Grizzly Lake Csd-Delleker's reported as 0 (not detected) sits at the 39th percentile in California and the 24th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
26 other systems share Plumas County; 10 of them have a higher latest lead result than Grizzly Lake Csd-Delleker. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| American Valley Csd | 3,778 | 0.3 ppb |
| Chester Public U.D. | 2,187 | 0 (not detected) |
| City Of Portola | 2,100 | 2 ppb |
| Hamilton Branch Csd | 1,874 | 0 (not detected) |
| West Almanor M.W.C. | 1,464 | 0 (not detected) |
| Ivcsd-Greenville | 795 | 1.49 ppb |
| Graeagle Water Company | 737 | 0 (not detected) |
| Whitehawk Ranch Mwc | 540 | 0 (not detected) |
| Lake Almanor Country Club Mwc | 500 | 0 (not detected) |
| Plumas Eureka Csd | 334 | 0 (not detected) |
Next steps for Portola, CA
Look up your address in Grizzly Lake Csd-Delleker'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 Grizzly Lake Csd-Delleker 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. Small systems behave differently: why small systems go over more often.