Public water system record
Twanoh Terrace Water Co
Serves an area of Mason County, WA · 75 people served
Federal records show no health-based violations and no monitoring or reporting issues for Twanoh Terrace Water Co 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
- 0
Key facts
- Twanoh Terrace Water Co draws water from 1 well.
- Record on file since 2005, with 0 health-based violations before October 19, 2016.
Check whether Twanoh Terrace Water Co 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, and no monitoring or reporting violations either.
Full record since 2005
EPA's records for Twanoh Terrace Water Co go back to 2005. Before October 19, 2016 they list no health-based violations and 44 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 44 |
Where the water comes from
Twanoh Terrace Water Co draws water from 1 well.
Annual water quality report
Twanoh Terrace Water Co 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 Twanoh Terrace Water Co 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