Community Water System · PWS WA5393600
Waterville Town Of
Operator location Waterville, Washington - 15% of 74 violations are health-based (middle-third health share (≤ 23%)); groundwater source; 1,140 served per SDWIS.
- 1,140
- People served (this PWS) Middle third of systems
- 74
- EPA violations (this PWS) Middle third of systems
- 11
- Health-based (this PWS) Middle third by health-based share
- Untested
- UCMR5 (this PWS) No UCMR5 result
Waterville Town Of standing, mid SDWIS violation third
15% of 74 recorded violations are health-based - middle-third health share (≤ 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 15% is middle-third health share (≤ 23%). Population rank #18,321 of 29,740 among systems serving 500+.
The verdict
Waterville Town Of lands in the middle third by violation volume (74), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 1,140 (mid served population (≤ 3,309)). Health-based share is 15% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #18,321 of 29,740
- Population · /systems
- #484 of 766
- Population · WA
- 74
- Total EPA violations on record
- 15%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 615
- County
- Douglas
- School/Daycare
- No
- MCL Violations
- 11
- Monitoring Violations
- 59
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 13 | 2019 |
| Coliform (TCR) | MCL | 11 | 2006 |
| Nitrate | MR | 7 | 2021 |
| Consumer Confidence Rule | Other | 4 | 2023 |
| Pentachlorophenol | MR | 3 | 2022 |
| Dinoseb | MR | 2 | 2022 |
| Dalapon | MR | 2 | 2022 |
| Picloram | MR | 2 | 2022 |
| 2,4,5-TP | MR | 2 | 2022 |
| Endrin | MR | 1 | 2008 |
| Methoxychlor | MR | 1 | 2008 |
| Toxaphene | MR | 1 | 2008 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2008 |
| Hexachlorocyclopentadiene | MR | 1 | 2008 |
| Atrazine | MR | 1 | 2008 |
| Heptachlor | MR | 1 | 2008 |
| Benzo(a)pyrene | MR | 1 | 2008 |
| Chlordane | MR | 1 | 2008 |
| Aldicarb sulfone | MR | 1 | 2008 |
| Carbofuran | MR | 1 | 2008 |
| Cadmium | MR | 1 | 1979 |
| Barium | MR | 1 | 1979 |
| Mercury | MR | 1 | 1979 |
| Chromium | MR | 1 | 1979 |
| Arsenic | MR | 1 | 1979 |
| LASSO | MR | 1 | 2008 |
| OXAMYL | MR | 1 | 2008 |
| Heptachlor epoxide | MR | 1 | 2008 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2008 |
| Selenium | MR | 1 | 1979 |
Violation Count vs. the National Corpus
Waterville Town Of has 74 recorded EPA violations, 66% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 33% carry more. 15% of this system's own violations are health-based (11 of 74), and it ranks #18,321 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)
74 Around the middle fewer violations than 33% 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
How many violations vs. how serious, among peer systems
Waterville Town Of plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.
Violation volume vs. health-based share
Health-based violations on Waterville Town Of
11 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WA5393600.
Sources: EPA SDWIS · Washington State Department of Health, Office of Drinking Water
Nationwide peers
74 violations · 1,140 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 Waterville Town 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.
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.