DIABLO WTR SYS-SEATTLE CITY LIGHT
PWSID: WA5319200 · Mt Vernon, WA · Serves 53 people
According to EPA Safe Drinking Water Information System (SDWIS), DIABLO WTR SYS-SEATTLE CITY LIGHT (PWSID WA5319200) in Mt Vernon, WA is listed as a CWS water system covering about 53 people. The same extract lists 1 health-based violation record spanning 2025-2025. Those 1 health-based row for DIABLO WTR SYS-SEATTLE CITY LIGHT cover contaminants such as Lead and Copper Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
DIABLO WTR SYS-SEATTLE CITY LIGHT has 1 health-based violation record in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 1 distinct EPA contaminant code appears in this system's record, including Lead and Copper Rule. Recorded violations span 2025–2025. Day-to-day primacy enforcement for this system runs through the Washington drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Washington state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- WA5319200
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Mt Vernon, WA
- Population Served
- 53
- Health Violations
- Yes (1)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Lead and Copper Rule | 1 | 1 |
Violation History (1)
| Contaminant | Health | Date |
|---|---|---|
| Lead and Copper Rule | Yes | Oct 23, 2025 |
Frequently Asked Questions
What does EPA SDWIS list for DIABLO WTR SYS-SEATTLE CITY LIGHT?
How many people does DIABLO WTR SYS-SEATTLE CITY LIGHT serve?
What violations does DIABLO WTR SYS-SEATTLE CITY LIGHT have?
What contaminants have been found in DIABLO WTR SYS-SEATTLE CITY LIGHT water?
Compare beyond Washington
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest DIABLO WTR SYS-SEATTLE CITY LIGHT on cumulative violation count (1) and EPA-reported population served (53). Violation-count peers include CHOCTAW - CONEHATTA, CHOCTAW - PEARL RIVER, CHOCTAW - TUCKER.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
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About This Data
DIABLO WTR SYS-SEATTLE CITY LIGHT (WA5319200) is drawn from EPA SDWIS. Nearby county systems in this extract include SKAGIT COUNTY PUD 1 JUDY RES; ANACORTES CITY OF; CARNATION WATER SYSTEM CITY OF; SHELTER BAY COMMUNITY INC. Health-based rows (1 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.