Public water system · CA3110051
ActiveNorthstar Csd - Martis Valley
At a glance
Northstar Csd - Martis Valley (PWSID CA3110051) is an active community water system in Placer County, California. It reports serving 4,493 people through 1,316 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,493
Service connections
1,316
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Northstar Csd - Martis Valley compare with other water systems in Placer County?
By EPA's size categories, Northstar Csd - Martis Valley is a medium system (3,301 to 10,000 people). Placer County has 116 active public water systems. Its population served is about 22% above the county average of 3,692 people per system, and accounts for 1% of the 428,242 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 Northstar Csd - Martis Valley is about 33% below 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates Northstar Csd - Martis Valley?
EPA lists Northstar Csd - Martis Valley as owned by a local 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. 35 of the 116 active systems in Placer County (30%) are also owned by a local government.
Does Northstar Csd - Martis Valley have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Northstar Csd - Martis Valley. For the latest compliance status, check EPA ECHO for current compliance history.
Northstar Csd - Martis Valley: frequently asked questions
Who runs Northstar Csd - Martis Valley?
Northstar Csd - Martis Valley (PWSID CA3110051) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Northstar Csd - Martis Valley serve?
Northstar Csd - Martis Valley reports serving 4,493 people through 1,316 service connections in Placer County, California.
Where does Northstar Csd - Martis Valley get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Northstar Csd - Martis Valley have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Northstar Csd - Martis Valley'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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Northstar Csd - Martis Valley's water quality report?
As a community water system, Northstar Csd - Martis Valley 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 Placer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Roseville | Placer | 155,612 | Community | Surface water |
| Placer Cwa - Foothill | Placer | 89,544 | Community | Surface water |
| City of Lincoln | Placer | 54,538 | Community | Purchased surface water |
| Placer Cwa - Auburn/Bowman | Placer | 27,294 | Community | Surface water |
| Northstar C.S.D. | Placer | 15,452 | Community | Surface water |
| Cal Am - West Placer | Placer | 8,861 | 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, “Northstar Csd - Martis Valley, PWSID CA3110051, California”, https://aquacensus.com/water-systems/california/northstar-csd-martis-valley-ca3110051 (data as of October 1, 2026).