Community Water System · PWS WA5319207
Diamond Lake Water & Sewer District
Operator location Newport, Washington - upper-third violation load (> 74 violations) with 83 EPA violations; groundwater source; 1,299 served (PWS-level, not municipal population).
- 1,299
- People served (this PWS)
- 83
- EPA violations (this PWS)
- 6
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Diamond Lake Water & Sewer District standing, high SDWIS violation third
83 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 7% is middle-third health share (≤ 23%). Population rank #17,211 of 29,740 among systems serving 500+.
The verdict
Diamond Lake Water & Sewer District sits in the upper third of the sitemap cohort by violation count (83), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,299 (mid served population (≤ 3,309)). Health-based share is 7% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #17,211 of 29,740
- Population · /systems
- #448 of 766
- Population · WA
- 83
- Total EPA violations on record
- 7%
- 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
- 650
- County
- Pend Oreille
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 71
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 6 | 2018 |
| Coliform (TCR) | MCL | 6 | 1992 |
| Nitrate | MR | 3 | 2024 |
| Endrin | MR | 2 | 2002 |
| BHC-GAMMA | MR | 2 | 2002 |
| Methoxychlor | MR | 2 | 2002 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2002 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 2002 |
| Hexachlorocyclopentadiene | MR | 2 | 2002 |
| Atrazine | MR | 2 | 2002 |
| Heptachlor | MR | 2 | 2002 |
| HEXACHLOROBENZENE | MR | 2 | 2002 |
| Chlordane | MR | 2 | 2002 |
| Heptachlor epoxide | MR | 2 | 2002 |
| Pentachlorophenol | MR | 2 | 2002 |
| Coliform (TCR) | MR | 2 | 1992 |
| Benzo(a)pyrene | MR | 2 | 2002 |
| Simazine | MR | 2 | 2002 |
| LASSO | MR | 2 | 2002 |
| Toxaphene | MR | 2 | 2002 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2008 |
| cis-1,2-Dichloroethylene | MR | 1 | 2008 |
| DICHLOROMETHANE | MR | 1 | 2008 |
| o-Dichlorobenzene | MR | 1 | 2008 |
| Vinyl chloride | MR | 1 | 2008 |
| 1,1-Dichloroethylene | MR | 1 | 2008 |
| trans-1,2-Dichloroethylene | MR | 1 | 2008 |
| 1,1,1-Trichloroethane | MR | 1 | 2008 |
| Trichloroethylene | MR | 1 | 2008 |
| Tetrachloroethylene | MR | 1 | 2008 |
Violation Count vs. the National Corpus
Diamond Lake Water & Sewer District has 83 recorded EPA violations, 69% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 31% carry more. 7% of this system's own violations are health-based (6 of 83), and it ranks #17,211 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)
83 Around the middle fewer violations than 31% 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 Diamond Lake Water & Sewer District
83 violations on record for WA5319207; 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
83 violations · 1,299 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 Diamond Lake Water & Sewer District
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.