Transient Non-Community Water System · PWS CA4700554
Caltrans-Collier Rest Stop
Operator location Redding, California - 0% of 2 violations are health-based (lower-third health share (≤ 1%)); surface water source; 1,400 served per SDWIS.
- 1,400
- People served (this PWS)
- 2
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Caltrans-Collier Rest Stop standing, low SDWIS violation third
0% of 2 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). Population rank #16,525 of 29,740 among systems serving 500+.
The verdict
Caltrans-Collier Rest Stop is in the lower third by violation count (2; 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 mid-pack at 1,400 (mid served population (≤ 3,309)). Health-based share is only 0% - almost all of this trail is monitoring or reporting. No UCMR5 PFAS test appears for this system in this extract.
- #16,525 of 29,740
- Population · /systems
- #1,032 of 1,701
- Population · CA
- 2
- 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
- Transient Non-Community
- Owner Type
- State
- Connections
- 1
- County
- Siskiyou
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 0
- Treatment Tech Violations
- 0
Violation Count vs. the National Corpus
Caltrans-Collier Rest Stop has 2 recorded EPA violations, 5% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 93% carry more. 0% of this system's own violations are health-based (0 of 2), and it ranks #16,525 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)
2 Among the lowest violation counts fewer violations than 93% 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
Health-based violations on Caltrans-Collier Rest Stop
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for CA4700554.
Sources: EPA SDWIS · California State Water Resources Control Board, Division of Drinking Water
Nationwide peers
2 violations · 1,400 served: nearest cross-state SDWIS matches.
Cross-state systems with similarly light violation ledgers
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Caltrans-Collier Rest Stop
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.