Community Water System · PWS WA5305859
Canterwood Water System
Operator location Gig Harbor, Washington - lower-third violation load (≤ 21 violations) with 18 EPA violations; groundwater source; 1,805 served (PWS-level, not municipal population).
- 1,805
- People served (this PWS)
- 18
- EPA violations (this PWS)
- 4
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Canterwood Water System standing, low SDWIS violation third
18 EPA SDWIS violations on record - lower-third violation load (≤ 21 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 22% is middle-third health share (≤ 23%). Population rank #14,407 of 29,740 among systems serving 500+.
The verdict
Canterwood Water System is in the lower third by violation count (18; 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 1,805 (mid served population (≤ 3,309)). Health-based share is 22% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #14,407 of 29,740
- Population · /systems
- #381 of 766
- Population · WA
- 18
- Total EPA violations on record
- 22%
- 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
- Private
- Connections
- 864
- County
- Pierce
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 13
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 8 | 2006 |
| Coliform (TCR) | MCL | 4 | 2014 |
| Lead and Copper Rule | MR | 1 | 1999 |
| Diquat | MR | 1 | 2006 |
| ETHYLENE DIBROMIDE | MR | 1 | 2006 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 1 | 2006 |
| Coliform (TCR) | MR | 1 | 1992 |
Violation Count vs. the National Corpus
Canterwood Water System has 18 recorded EPA violations, 29% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 70% carry more. 22% of this system's own violations are health-based (4 of 18), and it ranks #14,407 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)
18 Lower than most fewer violations than 70% 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
SDWIS compliance record for Canterwood Water System
18 violations on record for WA5305859; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS · Washington State Department of Health, Office of Drinking Water
Nationwide peers
18 violations · 1,805 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.
- Cheyenne Arapaho Concho EPA Region 6 — Tribal Water Systems 18violations
- Assiniboine & Sioux Rural Water System EPA Region 8 — Tribal Water Systems 18violations
- Poplar, City Of EPA Region 8 — Tribal Water Systems 18violations
- Torreon-Ojo Encino East - NTUA EPA Region 9 — Tribal Water Systems 18violations
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Canterwood Water System
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Washington compares on the same EPA violation measures. Washington 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.