Community Water System · PWS WA5318750
Delta Water Association
Operator location Lynden, Washington - 31% of 492 violations are health-based (upper-third health share (> 23%)); groundwater source; 450 served per SDWIS.
- 450
- People served (this PWS) Smaller third of systems
- 492
- EPA violations (this PWS) Upper third of systems
- 153
- Health-based (this PWS) Upper third by health-based share
- Untested
- UCMR5 (this PWS) No UCMR5 result
Delta Water Association standing, high SDWIS violation third
31% of 492 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 31% is upper-third health share (> 23%).
The verdict
Delta Water Association sits in the upper third of the sitemap cohort by violation count (492), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (450; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 31% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 492
- Total EPA violations on record
- 31%
- Health-based (MCL / treatment failure)
- 450
- 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.
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
- Private
- Connections
- 173
- County
- Whatcom
- School/Daycare
- No
- MCL Violations
- 153
- Monitoring Violations
- 334
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Nitrate | MCL | 143 | 2024 |
| Nitrate | MR | 20 | 2007 |
| Coliform (TCR) | MCL | 10 | 1993 |
| ETHYLENE DIBROMIDE | MR | 8 | 2008 |
| Pentachlorophenol | MR | 8 | 2005 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 8 | 2008 |
| Coliform (TCR) | MR | 8 | 1993 |
| Endrin | MR | 6 | 2005 |
| Methoxychlor | MR | 6 | 2005 |
| Simazine | MR | 6 | 2005 |
| Di(2-ethylhexyl) phthalate | MR | 6 | 2005 |
| Hexachlorocyclopentadiene | MR | 6 | 2005 |
| Atrazine | MR | 6 | 2005 |
| LASSO | MR | 6 | 2005 |
| Heptachlor | MR | 6 | 2005 |
| Heptachlor epoxide | MR | 6 | 2005 |
| Chlordane | MR | 6 | 2005 |
| Picloram | MR | 6 | 2005 |
| Dinoseb | MR | 6 | 2005 |
| Aldicarb sulfoxide | MR | 6 | 2005 |
| Aldicarb sulfone | MR | 6 | 2005 |
| Aldicarb | MR | 6 | 2005 |
| HEXACHLOROBENZENE | MR | 6 | 2005 |
| 2,4,5-TP | MR | 6 | 2005 |
| Di(2-ethylhexyl) adipate | MR | 6 | 2005 |
| BHC-GAMMA | MR | 6 | 2005 |
| Toxaphene | MR | 6 | 2005 |
| Carbofuran | MR | 6 | 2005 |
| Benzo(a)pyrene | MR | 6 | 2005 |
| Dalapon | MR | 6 | 2005 |
Violation Count vs. the National Corpus
Delta Water Association has 492 recorded EPA violations, 95% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 5% carry more. 31% of this system's own violations are health-based (153 of 492), 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)
492 Higher than most more violations than 95% 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
Delta Water Association 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 Delta Water Association
153 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for WA5318750.
Sources: EPA SDWIS · Washington State Department of Health, Office of Drinking Water
Nationwide peers
492 violations · 450 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 Delta Water Association
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.