Llano Mutual Water Company, CA
Exceeded the action level in the past
Latest 90th-percentile lead: 6.8 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. 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.
Llano Mutual Water Company at a glance
Llano Mutual Water Company serves about 245 people through 83 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Los Angeles County, California. EPA system ID: CA1900303; phone on file: 661-944-2939. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Llano Mutual Water Company's lead record
Against the period ending 2024 (6.8 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Llano Mutual Water Company is 18 ppb across 5 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 6.8 ppb |
| 2024 | 6.8 ppb |
| 2020 | 18 ppb over 15 |
| 2017 | 0 (not detected) |
| 2016 | 0 (not detected) |
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. Llano Mutual Water Company's 6.8 ppb sits at the 95th percentile in California and the 94th nationally (higher means more lead).
Nearby utilities
197 other systems share Los Angeles County; 3 of them have a higher latest lead result than Llano Mutual Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Los Angeles-City, Dept. Of Water & Power | 3,875,566 | 3.9 ppb |
| Long Beach Utilities Department | 466,772 | 0.97 ppb |
| Santa Clarita Valley Water Agency | 292,014 | 0 (not detected) |
| Gswc - Southwest | 277,740 | 1.7 ppb |
| San Gabriel Valley Water Co.-El Monte | 240,000 | 0 (not detected) |
| Los Angeles Cwwd 40 Reg 4 & 34 Lancaster | 208,129 | 1.8 ppb |
| Glendale-City, Water Dept. | 192,212 | 5.3 ppb |
| Suburban Water Systems-San Jose | 170,523 | 0 (not detected) |
| Pasadena Water And Power | 165,448 | 1.9 ppb |
| Pomona - City, Water Dept. | 151,713 | 2.1 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Llano, 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 Llano 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. More in what a past exceedance means today.