Public water system record
Hornbrook C.S.D.
Serves Hornbrook, Siskiyou County, CA · 280 people served
Federal records show 5 health-based violations and 1 monitoring/reporting issue for Hornbrook C.S.D. in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 5
- Resolved
- 4
- Unresolved
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- Hornbrook C.S.D. draws water from 4 wells.
- Most recent formal enforcement: compliance order (no penalty) by EPA, March 2026.
- Record on file since 1980, with 4 health-based violations before October 19, 2016.
Check whether Hornbrook C.S.D. 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 |
|---|---|---|---|---|
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | Dec 31, 2024 | Resolved | No |
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 |
Active
Enforcement action in place
|
No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | May 28, 2024 | Resolved | No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | Sep 1, 2019 | Resolved | No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | Jul 1, 2019 | Resolved | 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
|
Oct 17, 2024 |
Active
Enforcement action in place
|
Full record since 1980
EPA's records for Hornbrook C.S.D. go back to 1980. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 28 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 26 |
| 1990s | 4 | 1 |
| 2010 to October 18, 2016 | 0 | 1 |
| October 19, 2016 to 2019 | 2 | 0 |
| 2020s | 3 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began September 1997, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1997 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 1996 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 1995 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 1993 | Resolved |
Enforcement actions
California regulators and EPA took 6 formal enforcement actions against Hornbrook C.S.D. between 1994 and 2026. The most recent was a compliance order (no penalty) in March 2026.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Mar 5, 2026 | EPA | Compliance order (no penalty) | 2 violations (1 health-based): LEAD AND COPPER RULE REVISIONS |
| Oct 6, 2025 | California | Compliance order (no penalty) | 1 violation (1 health-based): Stage 1 Disinfection Byproducts Rule |
| May 28, 2024 | California | Compliance order (no penalty) | 1 violation (1 health-based): Stage 1 Disinfection Byproducts Rule |
| Jul 19, 2019 | California | Compliance order (no penalty) | 1 violation (1 health-based): Stage 1 Disinfection Byproducts Rule |
| Jan 20, 2016 | California | Compliance order (no penalty) | 1 violation: Total Coliform |
| Jun 24, 1994 | California | Signed compliance agreement | 1 violation (1 health-based): Surface Water Treatment Rule |
What the violations mean
Stage 1 Disinfection Byproducts Rule
4 incidentsThe system did not meet a treatment requirement of the Stage 1 Disinfectants and Disinfection Byproducts Rule
Byproducts form when disinfectants react with natural material in water. Long-term exposure above federal limits may increase cancer risk
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
Hornbrook C.S.D. draws water from 4 wells.
Annual water quality report
Hornbrook C.S.D. 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 Hornbrook C.S.D. 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