Community Water System · PWS WA5370550
Quistorff
Operator location Tacoma, Washington - UCMR5 detected 7 PFAS compounds (upper-third PFAS panel (> 4 compounds)) on this PWS; SDWIS lists 48 violations and 1,113 people served.
- 1,113
- People served (this PWS)
- 48
- EPA violations (this PWS)
- 8
- Health-based (this PWS)
- 7 PFAS
- UCMR5 (this PWS)
Quistorff standing, mid SDWIS violation third
UCMR5 detected 7 PFAS compounds - upper-third PFAS panel (> 4 compounds). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 17% is middle-third health share (≤ 23%). UCMR5: upper-third PFAS panel (> 4 compounds). Population rank #18,484 of 29,740 among systems serving 500+.
The verdict
Quistorff lands in the middle third by violation volume (48), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 1,113 (mid served population (≤ 3,309)). Health-based share is 17% (middle-third health share (≤ 23%)). UCMR5 detected 7 PFAS compounds (upper-third PFAS panel (> 4 compounds)).
- #18,484 of 29,740
- Population · /systems
- #488 of 766
- Population · WA
- 48
- Total EPA violations on record
- 17%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
7 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 423
- County
- Pierce
- School/Daycare
- No
- MCL Violations
- 8
- Monitoring Violations
- 40
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 8 | 1997 |
| Diquat | MR | 5 | 2005 |
| Coliform (TCR) | MR | 2 | 1993 |
| DICHLOROMETHANE | MR | 1 | 2008 |
| 1,2-Dichloropropane | MR | 1 | 2008 |
| Fluoride | MR | 1 | 2008 |
| Toluene | MR | 1 | 2008 |
| Mercury | MR | 1 | 2008 |
| Ethylbenzene | MR | 1 | 2008 |
| CHLOROBENZENE | MR | 1 | 2008 |
| p-Dichlorobenzene | MR | 1 | 2008 |
| Vinyl chloride | MR | 1 | 2008 |
| 1,1,2-Trichloroethane | MR | 1 | 2008 |
| CYANIDE | MR | 1 | 2008 |
| Selenium | MR | 1 | 2008 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1979 |
| 1,2-Dichloroethane | MR | 1 | 2008 |
| Chromium | MR | 1 | 2008 |
| 1,1-Dichloroethylene | MR | 1 | 2008 |
| Nickel | MR | 1 | 2008 |
| Tetrachloroethylene | MR | 1 | 2008 |
| Barium | MR | 1 | 2008 |
| Benzene | MR | 1 | 2008 |
| Styrene | MR | 1 | 2008 |
| cis-1,2-Dichloroethylene | MR | 1 | 2008 |
| Trichloroethylene | MR | 1 | 2008 |
| trans-1,2-Dichloroethylene | MR | 1 | 2008 |
| Thallium, Total | MR | 1 | 2008 |
| Antimony, Total | MR | 1 | 2008 |
| 1,1,1-Trichloroethane | MR | 1 | 2008 |
Violation Count vs. the National Corpus
Quistorff has 48 recorded EPA violations, 55% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 44% carry more. 17% of this system's own violations are health-based (8 of 48), and it ranks #18,484 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)
48 Around the middle fewer violations than 44% 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
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 14 of 232 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFMBA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 7/21/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 7/21/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 7/21/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| ADONA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 7/21/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFBA | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 7/21/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/21/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 7/21/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 7/21/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| NFDHA | 7/21/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFNA | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeS | 7/21/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 7/21/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFHpS | 7/21/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 7/21/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 7/21/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 7/21/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
UCMR5 PFAS record for Quistorff
Open EPA SDWIS federal reports for PWS WA5370550 to cross-check UCMR5 detections and violation codes; state primacy agencies enforce the Safe Drinking Water Act locally.
Sources: EPA SDWIS · Washington State Department of Health, Office of Drinking Water
Nationwide peers
48 violations · 1,113 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
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 Quistorff
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.