Nasa Ames Research Center, CA
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 10.42 ppb (monitoring period 2021-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
About Nasa Ames Research Center
Nasa Ames Research Center serves about 1,200 people through 239 service connections, which makes it a small system under EPA's size classes. It is federally owned and draws surface water, in Santa Clara County, California. EPA system ID: CA4300997. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2020 (10 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Nasa Ames Research Center is 15 ppb across 3 monitoring periods, none of them over 15 ppb (2 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 10.42 ppb over 10 |
| 2020 | 10 ppb |
| 2017 | 15 ppb over 10 |
How Nasa Ames Research Center 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. Nasa Ames Research Center's 10.42 ppb sits at the 98th percentile in California and the 97th nationally (higher means more lead).
Nearby utilities
72 other systems share Santa Clara County; 0 of them have a higher latest lead result than Nasa Ames Research Center. 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; Moffett Field, 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 Nasa Ames Research Center 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. What a 90th-percentile result does and does not tell you: how to read a lead result. This system is in the band the 2027 10 ppb rule changes.