Maple Valley Water Quality
Washington
According to EPA SDWIS, Maple Valley, Washington is served by 6 community water systems covering about 28,939 people. PlainEnviro's health-based extract shows zero health-based violation records for those systems. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Maple Valley, Washington is delivered through 6 EPA-regulated community water systems serving an estimated 28,939 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 0 violation records across the 6 active community systems shown here. Monitoring and reporting records are not present in the extract. No contaminant code appears in the health-based records.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Washington drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| CEDAR RIVER WATER & SEWER DISTRICT | 28,671 | 0 | Clean |
| EDGEHILL WATER ASSN | 109 | 0 | Clean |
| VALLEYBROOK VILLAGE | 65 | 0 | Clean |
| REED RANCH ROAD WATER | 36 | 0 | Clean |
| BILLINGTON | 34 | 0 | Clean |
| 165th Ave Water System | 24 | 0 | Clean |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Maple Valley, Washington? ▼
How many water violations does Maple Valley have in this EPA extract? ▼
How many water systems serve Maple Valley? ▼
Where does Maple Valley get its drinking water? ▼
How does Maple Valley compare in Washington?
Of the 365 Washington places with at least one community water system on file, Maple Valley ranks #72 by number of systems (6).
Either side of it: Fall City (6), Lake Forest Park (6), Spanaway (6), Wellpinit (6)
About This Data
Figures here are the current EPA SDWIS extract joined to the 6 community water systems whose service area lists Maple Valley, ranked against the 365 Washington places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.