Public water system record
Mount Si Mobile Home Estates
On record as serving King County, WA · Serves 200 people
Federal records show no health-based violations and 4 monitoring/reporting issues for Mount Si Mobile Home Estates in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- Mount Si Mobile Home Estates draws water from 1 well.
- Record on file since 1979, with 0 health-based violations before October 19, 2016.
Check whether Mount Si Mobile Home Estates serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2017 | Resolved |
Full record since 1979
EPA's records for Mount Si Mobile Home Estates go back to 1979. Before October 19, 2016 they list no health-based violations and 56 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 9 |
| 1990s | 0 | 6 |
| 2000s | 0 | 41 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 3 |
Where the water comes from
Mount Si Mobile Home Estates draws water from 1 well. It also has an emergency connection to Sallal Water Association Inc.
Emergency or part-time connections to
- Sallal Water Association Inc North Bend, WA
Annual water quality report
Mount Si Mobile Home Estates must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Mount Si Mobile Home Estates for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Washington.
Certified drinking water labs by state EPA guidance for private wells