Kyburz Mutual Water Company, CA
Exceeded the action level in the past
Latest 90th-percentile lead: 9.9 ppb (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
Kyburz Mutual Water Company serves about 30 people through 123 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in El Dorado County, California. EPA system ID: CA0900300; phone on file: 916-712-6485. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 3.1 ppb from 13 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Kyburz Mutual Water Company is 21.5 ppb across 8 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 9.9 ppb |
| 2024 | 13 ppb over 10 |
| 2023 | 17 ppb over 15 |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 0.6 ppb |
| 2019 | 12.2 ppb over 10 |
| 2018 | 21.5 ppb over 15 |
Against other California systems
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. Kyburz Mutual Water Company's 9.9 ppb sits at the 97th percentile in California and the 97th nationally (higher means more lead).
Other water systems in El Dorado County
18 other systems share El Dorado County; 1 of them has a higher latest lead result than Kyburz Mutual Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| El Dorado Id - Main | 128,408 | 0 (not detected) |
| South Tahoe Pud - Main | 30,089 | 0 (not detected) |
| Georgetown Divide Pud | 9,434 | 0 (not detected) |
| Placerville, City Of - Main | 9,224 | 0 (not detected) |
| Lukins Brothers Water Company | 3,277 | 3 ppb |
| Tahoe Keys Water Company | 1,420 | 2.5 ppb |
| Tahoe City Pud - Rubicon | 1,384 | 2.2 ppb |
| Grizzly Flats Community Servic | 1,093 | 2.5 ppb |
| Lakeside Park Association | 924 | 0 (not detected) |
| El Dorado Id - Outingdale | 478 | 0 (not detected) |
Next steps for Kyburz, CA
Test your own tap with a certified lab first-draw sample; Kyburz, 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 Kyburz Mutual Water Company 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. Why an old exceedance still matters: over the limit before, under it now.