Community Water System · PWS CA3110051
Northstar Csd - Martis Valley
Operator location Truckee, California - larger served population (> 3,309) at 4,493 people served; 0 SDWIS violations on record from groundwater sources.
- 4,493
- People served (this PWS)
- 0
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Northstar Csd - Martis Valley standing, low SDWIS violation third
4,493 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Population rank #8,273 of 29,740 among systems serving 500+.
The verdict
Northstar Csd - Martis Valley is in the lower third by violation count (0; lower-third violation load (≤ 21 violations)). A low count does not mean the system is unmonitored - monitoring and reporting violations still appear in SDWIS. Population served is large (4,493; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. No violations are on record in this extract. No UCMR5 PFAS test appears for this system in this extract.
- #8,273 of 29,740
- Population · /systems
- #667 of 1,701
- Population · CA
- 0
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,316
- County
- Placer
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 0
- Treatment Tech Violations
- 0
Violation Count vs. the National Corpus
Northstar Csd - Martis Valley has 0 recorded EPA violations, 0% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 96% carry more. 0% of this system's own violations are health-based (0 of 0), and it ranks #8,273 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
0 Among the lowest violation counts fewer violations than 96% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Population served record for Northstar Csd - Martis Valley
EPA SDWIS lists 4,493 people served and 1,316 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
0 violations · 4,493 served: nearest cross-state SDWIS matches.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Northstar Csd - Martis Valley
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in California compares on the same EPA violation measures. California systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.