Happy Acres Mwc, CA
Exceeded the action level in the past
Latest 90th-percentile lead: reported as 0 (not detected) (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.
Happy Acres Mwc at a glance
Happy Acres Mwc serves about 220 people through 79 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Santa Clara County, California. EPA system ID: CA4300551; phone on file: 408-691-9919. They can tell you what your service line is made of and whether they pay to replace it.
Happy Acres Mwc's lead record
That is down 2.6 ppb from 2.6 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Happy Acres Mwc is 38 ppb across 8 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2024 | 2.6 ppb |
| 2023 | 0 (not detected) |
| 2022 | 5 ppb |
| 2021 | 8 ppb |
| 2021 | 8 ppb |
| 2021 | 38 ppb over 15 |
| 2018 | 0 (not detected) |
How Happy Acres Mwc 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. Happy Acres Mwc's reported as 0 (not detected) sits at the 29th percentile in California and the 16th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Santa Clara County
72 other systems share Santa Clara County; 28 of them have a higher latest lead result than Happy Acres Mwc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| San Jose Water | 1,039,920 | 0 (not detected) |
| City Of Sunnyvale | 157,566 | 0 (not detected) |
| City Of Santa Clara | 134,587 | 2.7 ppb |
| Great Oaks Wc Inc | 112,582 | 0 (not detected) |
| City Of San Jose - Evg/Edv/Coy | 99,783 | 0 (not detected) |
| City Of Milpitas | 81,915 | 2.5 ppb |
| City Of Mountain View | 81,340 | 0 (not detected) |
| City Of Palo Alto | 67,658 | 0 (not detected) |
| Cwsc Los Altos Suburban | 63,559 | 1.5 ppb |
| City Of Gilroy | 59,426 | 2 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Gilroy, 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 Happy Acres Mwc 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. More in what a past exceedance means today.