Public water system · CA4300997
ActiveNasa Ames Research Center
At a glance
Nasa Ames Research Center (PWSID CA4300997) is an active community water system in Santa Clara County, California. It reports serving 16,273 people through 288 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by the federal government. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in March 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
16,273
Service connections
288
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Nasa Ames Research Center compare with other water systems in Santa Clara County?
By EPA's size categories, Nasa Ames Research Center is a large system (10,001 to 100,000 people). Santa Clara County has 121 active public water systems. Its population served is roughly in line with the county average of 17,334 people per system, and accounts for 0.8% of the 2,097,447 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active community water system reports serving 6,703 people, so Nasa Ames Research Center is about 143% above that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. California has 2,997 active community water systems, 40% of the state's 7,479 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 506 California systems (6.8%) list purchased surface water as their primary source.
Who owns and regulates Nasa Ames Research Center?
EPA lists Nasa Ames Research Center as owned by the federal government. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 1 of the 121 active systems in Santa Clara County (0.8%) are also owned by the federal government.
Does Nasa Ames Research Center have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in March 2015. The violations listed here began between October 2013 and March 2015. By type: 1 required treatment not met and 1 monitoring and reporting. The contaminants or rules involved are Surface Water Treatment Rule and Total coliform bacteria (TCR). EPA lists 2 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2015-03-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2013-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 2 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Nasa Ames Research Center: frequently asked questions
Who runs Nasa Ames Research Center?
Nasa Ames Research Center (PWSID CA4300997) is a community water system owned by the federal government. It is regulated by the CA state drinking water program.
How many people does Nasa Ames Research Center serve?
Nasa Ames Research Center reports serving 16,273 people through 288 service connections in Santa Clara County, California.
Where does Nasa Ames Research Center get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Nasa Ames Research Center have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in March 2015. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Nasa Ames Research Center's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in March 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Nasa Ames Research Center's water quality report?
As a community water system, Nasa Ames Research Center must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Santa Clara County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| San Jose Water | Santa Clara | 1,039,920 | Community | Surface water |
| City of Sunnyvale | Santa Clara | 157,566 | Community | Purchased surface water |
| City of Santa Clara | Santa Clara | 130,746 | Community | Purchased surface water |
| Great Oaks Wc Inc. | Santa Clara | 110,088 | Community | Groundwater |
| City of San Jose - Evg/Edv/Coy | Santa Clara | 101,265 | Community | Purchased surface water |
| City of Milpitas | Santa Clara | 81,773 | Community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Nasa Ames Research Center, PWSID CA4300997, California”, https://aquacensus.com/water-systems/california/nasa-ames-research-center-ca4300997 (data as of October 1, 2026).