Public water system record
Thunderbird Terrace Water System
Serves an area of Snohomish County, WA · 75 people served
Federal records show 1 health-based violation and 7 monitoring/reporting issues for Thunderbird Terrace Water System in the last ten years. The most serious issue in this window was a resolved Haloacetic Acids (HAA5) violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 7
Key facts
- Thunderbird Terrace Water System draws water from 1 surface water intake.
- Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 69.1 µg/L, federal limit 60 µg/L (1.2 times the limit), 2020.
- Most recent formal enforcement: compliance order (no penalty) by Washington, October 2020.
- Record on file since 2010, with 0 health-based violations before October 19, 2016.
Check whether Thunderbird Terrace Water System 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.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 69.1 µg/L, federal limit 60 µg/L (1.2 times the limit)
|
220 | Apr 1, 2020 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2025 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2022 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Aug 1, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2018 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2016 | Resolved |
Full record since 2010
EPA's records for Thunderbird Terrace Water System go back to 2010. Before October 19, 2016 they list no health-based violations and 9 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2010 to October 18, 2016 | 0 | 9 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 1 | 5 |
Enforcement actions
Washington regulators took 1 formal enforcement action against Thunderbird Terrace Water System in 2020. The most recent was a compliance order (no penalty) in October 2020.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 14, 2020 | Washington | Compliance order (no penalty) | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
What the violations mean
Haloacetic Acids (HAA5)
1 incidentHaloacetic acid byproducts exceeded the federal limit
Long-term exposure to HAAs may increase cancer risk
Where the water comes from
Thunderbird Terrace Water System draws water from 1 surface water intake.
Annual water quality report
Thunderbird Terrace Water System 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 Thunderbird Terrace Water System 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