Valenzuela Water System, CA
Exceeded the action level in the past
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 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.
Valenzuela Water System at a glance
Valenzuela Water System serves about 55 people through 17 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in San Benito County, California. EPA system ID: CA3500527; phone on file: 831-524-8811. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Valenzuela Water System is 43 ppb across 13 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 1 ppb |
| 2019 | 7.5 ppb |
| 2019 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2017 | 18 ppb over 15 |
| 2016 | 43 ppb over 15 |
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. Valenzuela Water System's reported as 0 (not detected) sits at the 9th percentile in California and the 4th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
30 other systems share San Benito County; 9 of them have a higher latest lead result than Valenzuela Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hollister, City Of | 26,598 | 1.4 ppb |
| Sunnyslope County Water Dist | 25,486 | 0 (not detected) |
| Aromas Water District | 2,988 | 1.4 ppb |
| San Juan Bautista, City Of | 2,335 | 0 (not detected) |
| Mission Oaks Mobile Home Park | 550 | 0 (not detected) |
| Tres Pinos Cwd | 350 | 0 (not detected) |
| Golden State Water Co - San Juan Oaks | 260 | 0 (not detected) |
| Csa No. 31 Stonegate Ws | 230 | 0.7 ppb |
| San Justo Mutual Water Company | 166 | 0 (not detected) |
| Hollister Ranch Estates | 150 | 0 (not detected) |
Next steps for Hollister, CA
Test your own tap with a certified lab first-draw sample; Hollister, 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 Valenzuela Water System 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.