Lassen County Water Works District #1, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 3 ppb (monitoring period 2026-2026). 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
Lassen County Water Works District #1 serves about 450 people through 190 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Lassen County, California. EPA system ID: CA1810003; phone on file: 530-278-6476. They can tell you what your service line is made of and whether they pay to replace it.
Lassen County Water Works District #1's lead record
That is up 3 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Lassen County Water Works District #1 is 10 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 3 ppb |
| 2022 | 0 (not detected) |
| 2019 | 5.5 ppb |
| 2016 | 10 ppb |
How Lassen County Water Works District #1 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. Lassen County Water Works District #1's 3 ppb sits at the 85th percentile in California and the 82nd nationally (higher means more lead).
Other water systems in Lassen County
14 other systems share Lassen County; 1 of them has a higher latest lead result than Lassen County Water Works District #1. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Susanville | 7,811 | 0 (not detected) |
| Cdcr-High Desert State Prison | 3,857 | 0 (not detected) |
| Westwood C.S.D. | 1,662 | 0.91 ppb |
| Leavitt Lake Csd | 950 | 0 (not detected) |
| Herlong Public Utility District | 831 | 1 ppb |
| Lake Forest Mutual W.C. | 565 | 0 (not detected) |
| Clear Creek Csd-Westwood | 400 | 2.94 ppb |
| Susan Hills Estates Wc | 252 | 0 (not detected) |
| Susan River Park Water Co. | 140 | 0 (not detected) |
| Pineview Mobile Home Park | 80 | 0 (not detected) |
Next steps for Bieber, CA
Test your own tap with a certified lab first-draw sample; Bieber, 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 Lassen County Water Works District #1 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. Systems that went over once often dip back under; here is what that means.