SANTA ROSA, CA · Sonoma County
SHAMROCK MOBILE HOME PARK Water System
Consumer Confidence Report status
SHAMROCK MOBILE HOME PARK must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for SHAMROCK MOBILE HOME PARK.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.
System facts
- System ID (PWSID)
- CA4900723
- System type
- Community Water System
- Population served
- 188
- Service connections
- 127
- Ownership
- privately owned
- Water source
- groundwater (wells)
SHAMROCK MOBILE HOME PARK is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 188 people from groundwater.
As of August 1, 2026, its federal record holds 12 entries between 1981 and 2025, all of which EPA lists as closed.
Of the 12, 4 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves inorganic chemicals, the Miscellaneous Other Rules, and the Stage 1 Disinfectants and Disinfection Byproducts Rule.
Violation history
Variance/Exemption/Other Compliance
—No contaminant on record
September 24, 2025 – December 24, 2025
ArchivedMaximum Contaminant Level Violation, Average
Health-basedArsenic
January 1, 2012 – March 31, 2012
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2011 – September 30, 2011
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2011 – June 30, 2011
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
April 1, 2010 – June 30, 2010
ResolvedMonitoring and Reporting (DBP)
—TTHM
January 1, 2010 – December 31, 2012
ResolvedMonitoring, Regular
—Arsenic
July 1, 2008 – September 30, 2008
ResolvedMonitoring, Regular
—Nitrite
January 1, 2006 – December 31, 2006
ResolvedNotification, Public
—No contaminant on record
September 1, 1984 – September 30, 1984
ArchivedNotification, Public
—No contaminant on record
August 1, 1984 – August 31, 1984
ArchivedNotification, Public
—No contaminant on record
July 1, 1984 – July 31, 1984
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
October 1, 1981 – September 30, 1982
Archived
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| September 24, 2025 – December 24, 2025 | Variance/Exemption/Other Compliance | — | — | Archived |
| January 1, 2012 – March 31, 2012 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| July 1, 2011 – September 30, 2011 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| April 1, 2011 – June 30, 2011 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| April 1, 2010 – June 30, 2010 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
| January 1, 2010 – December 31, 2012 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| July 1, 2008 – September 30, 2008 | Monitoring, Regular | Arsenic | — | Resolved |
| January 1, 2006 – December 31, 2006 | Monitoring, Regular | Nitrite | — | Resolved |
| September 1, 1984 – September 30, 1984 | Notification, Public | — | — | Archived |
| August 1, 1984 – August 31, 1984 | Notification, Public | — | — | Archived |
| July 1, 1984 – July 31, 1984 | Notification, Public | — | — | Archived |
| October 1, 1981 – September 30, 1982 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
Enforcement actions
- March 11, 2013State Administrative/Compliance Order without penalty issued8 linked violations
- December 14, 2007State Compliance achieved26 linked violations
Common questions
Is SHAMROCK MOBILE HOME PARK required to publish a Consumer Confidence Report?
- Yes. SHAMROCK MOBILE HOME PARK is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is SHAMROCK MOBILE HOME PARK’s next Consumer Confidence Report due?
- SHAMROCK MOBILE HOME PARK’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SHAMROCK MOBILE HOME PARK have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for SHAMROCK MOBILE HOME PARK.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
MARTIN, ALAN
707-318-1569
SANTA ROSA, CA 95403