Community Water System · PWS WA5349650
Mabton City Of
Operator location Mabton, Washington - upper-third violation load (> 74 violations) with 172 EPA violations; groundwater source; 2,150 served (PWS-level, not municipal population).
- 2,150
- People served (this PWS)
- 172
- EPA violations (this PWS)
- 1
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Mabton City Of standing, high SDWIS violation third
172 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 1% is middle-third health share (≤ 23%). Population rank #13,025 of 29,740 among systems serving 500+.
The verdict
Mabton City Of sits in the upper third of the sitemap cohort by violation count (172), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 2,150 (mid served population (≤ 3,309)). Health-based share is 1% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #13,025 of 29,740
- Population · /systems
- #340 of 766
- Population · WA
- 172
- Total EPA violations on record
- 1%
- 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
- 636
- County
- Yakima
- School/Daycare
- No
- MCL Violations
- 1
- Monitoring Violations
- 171
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 34 | 2006 |
| Revised Total Coliform Rule | MON | 6 | 2022 |
| Arsenic | MR | 5 | 2019 |
| Nitrate | MR | 5 | 2018 |
| Coliform (TCR) | MR | 4 | 2015 |
| Pentachlorophenol | MR | 4 | 2002 |
| Barium | MR | 4 | 2005 |
| Cadmium | MR | 4 | 2005 |
| Mercury | MR | 4 | 2005 |
| Chromium | MR | 4 | 2005 |
| Fluoride | MR | 4 | 2005 |
| Selenium | MR | 4 | 2005 |
| Thallium, Total | MR | 3 | 2005 |
| Beryllium, Total | MR | 3 | 2005 |
| CYANIDE | MR | 3 | 2005 |
| Nickel | MR | 3 | 2005 |
| Antimony, Total | MR | 3 | 2005 |
| Dalapon | MR | 2 | 2002 |
| 2,4,5-TP | MR | 2 | 2002 |
| Aldicarb sulfone | MR | 2 | 2002 |
| Aldicarb | MR | 2 | 2002 |
| Endrin | MR | 2 | 2002 |
| Methoxychlor | MR | 2 | 2002 |
| Toxaphene | MR | 2 | 2002 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2002 |
| Simazine | MR | 2 | 2002 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 2002 |
| Atrazine | MR | 2 | 2002 |
| LASSO | MR | 2 | 2002 |
| Heptachlor | MR | 2 | 2002 |
Violation Count vs. the National Corpus
Mabton City Of has 172 recorded EPA violations, 83% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 17% carry more. 1% of this system's own violations are health-based (1 of 172), and it ranks #13,025 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)
172 Higher than most more violations than 83% 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 Mabton City Of
172 violations on record for WA5349650; 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
172 violations · 2,150 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
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 Mabton City Of
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.