Alturas Fillmore Mhp, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2026). 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.
Who runs the water here
Alturas Fillmore Mhp serves about 99 people through 33 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Ventura County, California. EPA system ID: CA5601106; phone on file: 949-299-0942. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Alturas Fillmore Mhp is 0 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2017 | 0 (not detected) |
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. Alturas Fillmore Mhp's reported as 0 (not detected) sits at the 17th percentile in California and the 9th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Ventura County
67 other systems share Ventura County; 6 of them have a higher latest lead result than Alturas Fillmore Mhp. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Oxnard Water Dept | 200,232 | 0 (not detected) |
| Ventura Water Department | 112,285 | 0 (not detected) |
| Ventura Wwd No. 8 - Simi Valley | 94,736 | 0 (not detected) |
| Cal American Water Co | 66,809 | 3 ppb |
| City Of Thousand Oaks Water Department | 54,770 | 0 (not detected) |
| Camarillo Water Dept | 47,701 | 0 (not detected) |
| Golden State Water Company - Simi Valley | 45,086 | 6 ppb |
| Ventura Cwwd No. 1 - Moorpark | 35,514 | 0 (not detected) |
| Camrosa Water District | 32,700 | 0 (not detected) |
| City Of Santa Paula | 31,786 | 0 (not detected) |
Next steps for Irvine, CA
Look up your address in Alturas Fillmore Mhp'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 Alturas Fillmore Mhp 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.