Public water system record
U.S.N., San Nicolas Island
Serves an area of Ventura County, CA · 254 people served
Federal records show no health-based violations and no monitoring or reporting issues for U.S.N., San Nicolas Island 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
- 0
Key facts
- U.S.N., San Nicolas Island draws water from 1 well.
- Most recent formal enforcement: compliance order (no penalty) by California, January 2007.
- Record on file since 1993, with 4 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 64 service lines.
Check whether U.S.N., San Nicolas Island 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, and no monitoring or reporting violations either.
Full record since 1993
EPA's records for U.S.N., San Nicolas Island go back to 1993. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 7 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 3 |
| 2000s | 3 | 3 |
| 2010 to October 18, 2016 | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2005, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.257 mg/L, federal limit 0.08 mg/L (3.2 times the limit)
|
Oct 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2003 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2000 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 1993 | Resolved |
Enforcement actions
California regulators took 4 formal enforcement actions against U.S.N., San Nicolas Island between 1993 and 2007. The most recent was a compliance order (no penalty) in January 2007.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 1, 2007 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Nov 3, 2000 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Jun 27, 2000 | California | Compliance order (no penalty) | 1 violation: Total Coliform |
| Oct 8, 1993 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
Where the water comes from
U.S.N., San Nicolas Island draws water from 1 well.
Annual water quality report
U.S.N., San Nicolas Island 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 U.S.N., San Nicolas Island 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