Public water system record
Halcyon Water System
Serves Oceano, San Luis Obispo County, CA · 110 people served
Federal records show 1 health-based violation and 21 monitoring/reporting issues for Halcyon Water System in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 21
Key facts
- Halcyon Water System draws water from 1 well.
- Most recent formal enforcement: compliance order (no penalty) by California, January 2024.
- Record on file since 1979, with 17 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 46 unknown out of 46 service lines.
Check whether Halcyon 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 |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Active | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Selenium
Monitoring and reporting
|
Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Selenium
Monitoring and reporting
|
Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Selenium
Monitoring and reporting
|
Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Active |
|
Selenium
Monitoring and reporting
|
Oct 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Selenium
Monitoring and reporting
|
Jul 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Selenium
Monitoring and reporting
|
Apr 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jul 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Apr 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Jan 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Jan 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Oct 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Oct 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Jul 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Jan 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Oct 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Jul 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
May 25, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Jan 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
Full record since 1979
EPA's records for Halcyon Water System go back to 1979. Before October 19, 2016 they list 17 health-based violations (17 archived by EPA without a recorded fix) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1980s | 17 | 2 |
| 1990s | 0 | 1 |
| 2020s | 1 | 21 |
Most recent health-based violation before October 19, 2016: Selenium, began September 1984, Archived.
Show all 17 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Selenium
Contaminant limit exceeded
|
Sep 1, 1984 | Archived |
|
Selenium
Contaminant limit exceeded
|
Aug 1, 1984 | Archived |
|
Selenium
Contaminant limit exceeded
|
Jul 1, 1984 | Archived |
|
Selenium
Contaminant limit exceeded
|
Jun 1, 1984 | Archived |
|
Selenium
Contaminant limit exceeded
|
May 1, 1984 | Archived |
|
Selenium
Contaminant limit exceeded
|
Apr 1, 1984 | Archived |
|
Selenium
Contaminant limit exceeded
|
Mar 1, 1984 | Archived |
|
Selenium
Contaminant limit exceeded
|
Jan 1, 1984 | Archived |
|
Selenium
Contaminant limit exceeded
|
Dec 1, 1983 | Archived |
|
Selenium
Contaminant limit exceeded
|
Nov 1, 1983 | Archived |
|
Selenium
Contaminant limit exceeded
|
Oct 1, 1983 | Archived |
|
Selenium
Contaminant limit exceeded
|
Aug 1, 1983 | Archived |
|
Selenium
Contaminant limit exceeded
|
Jul 1, 1983 | Archived |
|
Selenium
Contaminant limit exceeded
|
Mar 1, 1983 | Archived |
|
Selenium
Contaminant limit exceeded
|
Dec 1, 1982 | Archived |
|
Selenium
Contaminant limit exceeded
|
Nov 1, 1982 | Archived |
|
Selenium
Contaminant limit exceeded
|
Oct 1, 1982 | Archived |
Enforcement actions
California regulators took 6 formal enforcement actions against Halcyon Water System between 2020 and 2024. The most recent was a compliance order (no penalty) in January 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 29, 2024 | California | Compliance order (no penalty) | 1 violation: Nitrate |
| Jun 8, 2023 | California | Compliance order (no penalty) | 1 violation: Nitrate |
| Aug 2, 2022 | California | Compliance order (no penalty) | 7 violations: Nitrate, Selenium |
| Jun 10, 2021 | California | Compliance order (no penalty) | 10 violations: Nitrate |
| May 25, 2021 | California | Compliance order (no penalty) | 1 violation: Nitrate |
| Dec 21, 2020 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
What the violations mean
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
Halcyon Water System draws water from 1 well.
Annual water quality report
Halcyon 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 Halcyon 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 California.
Certified drinking water labs by state EPA guidance for private wells