Community Water System · PWS WA5323400
Endicott Water Dept
Operator location Endicott, Washington - smaller served population (≤ 999) at 488 people served; 122 SDWIS violations on record from groundwater sources.
- 488
- People served (this PWS)
- 122
- EPA violations (this PWS)
- 12
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Endicott Water Dept standing, high SDWIS violation third
488 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 10% is middle-third health share (≤ 23%).
The verdict
Endicott Water Dept sits in the upper third of the sitemap cohort by violation count (122), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (488; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 10% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 122
- Total EPA violations on record
- 10%
- Health-based (MCL / treatment failure)
- 488
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
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
- 187
- County
- Whitman
- School/Daycare
- No
- MCL Violations
- 12
- Monitoring Violations
- 107
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MR | 8 | 2006 |
| Nitrate | MCL | 7 | 2006 |
| Coliform (TCR) | MCL | 5 | 1993 |
| Toxaphene | MR | 3 | 2020 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2020 |
| Simazine | MR | 3 | 2020 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2020 |
| Hexachlorocyclopentadiene | MR | 3 | 2020 |
| LASSO | MR | 3 | 2020 |
| Heptachlor | MR | 3 | 2020 |
| Benzo(a)pyrene | MR | 3 | 2020 |
| Endrin | MR | 3 | 2020 |
| Methoxychlor | MR | 3 | 2020 |
| BHC-GAMMA | MR | 3 | 2020 |
| Atrazine | MR | 3 | 2020 |
| Heptachlor epoxide | MR | 3 | 2020 |
| Coliform (TCR) | MR | 3 | 1992 |
| Chlordane | MR | 3 | 2020 |
| HEXACHLOROBENZENE | MR | 3 | 2020 |
| Pentachlorophenol | MR | 2 | 2008 |
| Barium | MR | 2 | 2014 |
| Cadmium | MR | 2 | 2014 |
| Fluoride | MR | 2 | 2014 |
| Mercury | MR | 2 | 2014 |
| Selenium | MR | 2 | 2014 |
| Arsenic | MR | 2 | 2014 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2016 |
| Chromium | MR | 2 | 2014 |
| Dalapon | MR | 1 | 2008 |
| Dinoseb | MR | 1 | 2008 |
Violation Count vs. the National Corpus
Endicott Water Dept has 122 recorded EPA violations, 77% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 23% carry more. 10% of this system's own violations are health-based (12 of 122), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
122 Higher than most more violations than 77% 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 Endicott Water Dept
EPA SDWIS lists 488 people served and 187 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Washington State Department of Health, Office of Drinking Water
Nationwide peers
122 violations · 488 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.
What to do with Endicott Water Dept
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.