Public water system record
Sierra East HOA
Serves Walker, Mono County, CA · 84 people served
Federal records show 21 health-based violations and 7 monitoring/reporting issues for Sierra East HOA in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 21
- Resolved
- 0
- Unresolved
- 1
- Archived by EPA
- 20
- Any acute record
- No
- Monitoring issues, last 10 years
- 7
Key facts
- Sierra East HOA draws water from 3 wells (1 of them for emergency, seasonal or other part-time use).
- Highest measured level in the last 10 years: Arsenic, 88 µg/L, federal limit 10 µg/L (8.8 times the limit), 2021.
- Most recent formal enforcement: compliance order (no penalty) by California, September 2019.
- Record on file since 2004, with 12 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 30 unknown out of 30 service lines.
Check whether Sierra East HOA 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 |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Active | No |
|
Arsenic
Contaminant limit exceeded
Measured 51 µg/L, federal limit 10 µg/L (5.1 times the limit)
|
330 | Apr 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 88 µg/L, federal limit 10 µg/L (8.8 times the limit)
|
330 | Apr 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 44 µg/L, federal limit 10 µg/L (4.4 times the limit)
|
330 | Jan 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 77 µg/L, federal limit 10 µg/L (7.7 times the limit)
|
330 | Jan 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 48 µg/L, federal limit 10 µg/L (4.8 times the limit)
|
330 | Oct 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 30 µg/L, federal limit 10 µg/L (3 times the limit)
|
330 | Oct 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 31 µg/L, federal limit 10 µg/L (3.1 times the limit)
|
330 | Jul 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 75 µg/L, federal limit 10 µg/L (7.5 times the limit)
|
330 | Jul 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 56 µg/L, federal limit 10 µg/L (5.6 times the limit)
|
330 | Apr 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 35 µg/L, federal limit 10 µg/L (3.5 times the limit)
|
330 | Jan 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 33 µg/L, federal limit 10 µg/L (3.3 times the limit)
|
330 | Oct 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 51 µg/L, federal limit 10 µg/L (5.1 times the limit)
|
330 | Jul 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 31 µg/L, federal limit 10 µg/L (3.1 times the limit)
|
330 | Jun 1, 2019 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.01 mg/L (6.2 times the limit)
|
330 | Oct 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.055 mg/L, federal limit 0.01 mg/L (5.5 times the limit)
|
330 | Jul 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.05 mg/L, federal limit 0.01 mg/L (5 times the limit)
|
330 | Apr 1, 2018 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.032 mg/L, federal limit 0.01 mg/L (3.2 times the limit)
|
330 | Jul 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.047 mg/L, federal limit 0.01 mg/L (4.7 times the limit)
|
330 | Jul 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.053 mg/L, federal limit 0.01 mg/L (5.3 times the limit)
|
330 | Apr 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.055 mg/L, federal limit 0.01 mg/L (5.5 times the limit)
|
330 | Oct 1, 2016 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Active |
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Active |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Arsenic
Monitoring and reporting
|
Oct 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2018 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
Full record since 2004
EPA's records for Sierra East HOA go back to 2004. Before October 19, 2016 they list 12 health-based violations (12 archived by EPA without a recorded fix) and 18 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 3 |
| 2010 to October 18, 2016 | 12 | 15 |
| October 19, 2016 to 2019 | 9 | 5 |
| 2020s | 11 | 2 |
Most recent health-based violation before October 19, 2016: Arsenic, began October 2016, Archived.
Show all 12 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.055 mg/L, federal limit 0.01 mg/L (5.5 times the limit)
|
Oct 1, 2016 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.056 mg/L, federal limit 0.01 mg/L (5.6 times the limit)
|
Jul 1, 2016 | Archived |
|
Arsenic
Contaminant limit exceeded
|
Apr 1, 2016 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.147 mg/L, federal limit 0.01 mg/L (15 times the limit)
|
Jan 1, 2016 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.01 mg/L (7 times the limit)
|
Oct 1, 2015 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.01 mg/L (8.2 times the limit)
|
Jul 1, 2015 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.038 mg/L, federal limit 0.01 mg/L (3.8 times the limit)
|
Apr 1, 2015 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.035 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
|
Jan 1, 2015 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.04 mg/L, federal limit 0.01 mg/L (4 times the limit)
|
Oct 1, 2014 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.041 mg/L, federal limit 0.01 mg/L (4.1 times the limit)
|
Apr 1, 2013 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.041 mg/L, federal limit 0.01 mg/L (4.1 times the limit)
|
Jan 1, 2013 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.01 mg/L (8.8 times the limit)
|
Jan 1, 2012 | Archived |
Enforcement actions
California regulators took 5 formal enforcement actions against Sierra East HOA between 2012 and 2019, filed as 7 records in EPA's data. The most recent was a compliance order (no penalty) in September 2019.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 5, 2019 | California | Compliance order (no penalty) | 2 violations: Arsenic |
| Feb 8, 2019 | California | Compliance order (no penalty) | 4 violations: Arsenic, Lead and Copper Rule |
| Mar 9, 2016 | California | Compliance order (no penalty) | 9 violations (1 health-based): Arsenic |
| Jan 19, 2015 | California | Compliance order (no penalty) | 1 violation: Arsenic |
| Feb 3, 2012 | California | Compliance order (no penalty) | 36 violations (30 health-based): Arsenic |
What the violations mean
Arsenic
20 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
Sierra East HOA draws water from 3 wells (1 of them for emergency, seasonal or other part-time use).
Annual water quality report
Sierra East HOA 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 Sierra East HOA 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 California.
Certified drinking water labs by state EPA guidance for private wells