Rosa Morada Mutual Water Company, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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 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 Rosa Morada Mutual Water Company
Rosa Morada Mutual Water Company serves about 69 people through 21 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: CA3500549; phone on file: 831-245-6250. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2021 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Rosa Morada Mutual Water Company is 3.83 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2018 | 3.83 ppb |
How Rosa Morada Mutual Water Company 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. Rosa Morada Mutual Water Company's reported as 0 (not detected) sits at the 13th percentile in California and the 6th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in San Benito County
30 other systems share San Benito County; 9 of them have a higher latest lead result than Rosa Morada Mutual Water Company. 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
Look up your address in Rosa Morada Mutual Water Company'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 Rosa Morada 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Small systems behave differently: why small systems go over more often.