Public water system record
Lake Margaret Water System
Serves an area of King County, WA · 406 people served
Federal records show no health-based violations and 45 monitoring/reporting issues for Lake Margaret Water System 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
- 45
Key facts
- Lake Margaret Water System draws water from 1 well and 1 surface water intake (1 of them for emergency, seasonal or other part-time use).
- Record on file since 1979, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 160 service lines.
Check whether Lake Margaret 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 | Resolved |
|
Styrene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Styrene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Toluene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Benzene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2018 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2017 | Resolved |
Full record since 1979
EPA's records for Lake Margaret Water System go back to 1979. Before October 19, 2016 they list 1 health-based violation (1 archived by EPA without a recorded fix) and 66 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 9 |
| 1990s | 0 | 1 |
| 2000s | 1 | 52 |
| 2010 to October 18, 2016 | 0 | 4 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 0 | 43 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began June 2009, Archived.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 2009 | Archived |
Where the water comes from
Lake Margaret Water System draws water from 1 well and 1 surface water intake (1 of them for emergency, seasonal or other part-time use).
Annual water quality report
Lake Margaret 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 Lake Margaret 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