HOWELL MOUNTAIN MUTUAL WATER COMPANY
PWSID: CA2810001 · Angwin, CA · Serves 1,240 people
According to EPA Safe Drinking Water Information System (SDWIS), HOWELL MOUNTAIN MUTUAL WATER COMPANY (PWSID CA2810001) in Angwin, CA is listed as a CWS water system covering about 1,240 people. The same extract lists 65 health-based violation records spanning 2008-2023. Those 65 health-based rows for HOWELL MOUNTAIN MUTUAL WATER COMPANY cover contaminants such as TTHM, Total Haloacetic Acids (HAA5); they remain historical EPA registry entries, not a current compliance or drinkability score.
HOWELL MOUNTAIN MUTUAL WATER COMPANY has 65 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 2 distinct EPA contaminant codes appear in this system's record, including TTHM, Total Haloacetic Acids (HAA5). Recorded violations span 2008–2023. Day-to-day primacy enforcement for this system runs through the California drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the California state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- CA2810001
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Angwin, CA
- Population Served
- 1,240
- Health Violations
- Yes (65)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| TTHM | 43 | 43 |
| Total Haloacetic Acids (HAA5) | 22 | 22 |
Violation History (65)
| Contaminant | Health | Date |
|---|---|---|
| TTHM | Yes | Jan 1, 2023 |
| TTHM | Yes | Jan 1, 2023 |
| TTHM | Yes | Jan 1, 2023 |
| TTHM | Yes | Jan 1, 2023 |
| TTHM | Yes | Oct 1, 2022 |
| TTHM | Yes | Jul 1, 2022 |
| TTHM | Yes | Apr 1, 2021 |
| TTHM | Yes | Apr 1, 2021 |
| TTHM | Yes | Apr 1, 2021 |
| TTHM | Yes | Oct 1, 2016 |
| TTHM | Yes | Oct 1, 2016 |
| TTHM | Yes | Jul 1, 2016 |
| TTHM | Yes | Jul 1, 2016 |
| TTHM | Yes | Jul 1, 2013 |
| TTHM | Yes | Jul 1, 2013 |
| TTHM | Yes | Jul 1, 2013 |
| TTHM | Yes | Apr 1, 2013 |
| TTHM | Yes | Apr 1, 2013 |
| TTHM | Yes | Apr 1, 2013 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2011 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2011 |
| TTHM | Yes | Jan 1, 2011 |
| TTHM | Yes | Jan 1, 2011 |
| Total Haloacetic Acids (HAA5) | Yes | Jan 1, 2011 |
| Total Haloacetic Acids (HAA5) | Yes | Jan 1, 2011 |
| TTHM | Yes | Oct 1, 2010 |
| TTHM | Yes | Oct 1, 2010 |
| Total Haloacetic Acids (HAA5) | Yes | Oct 1, 2010 |
| Total Haloacetic Acids (HAA5) | Yes | Oct 1, 2010 |
| TTHM | Yes | Jul 1, 2010 |
| TTHM | Yes | Jul 1, 2010 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2010 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2010 |
| TTHM | Yes | Apr 1, 2010 |
| TTHM | Yes | Apr 1, 2010 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2010 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2010 |
| TTHM | Yes | Jan 1, 2010 |
| TTHM | Yes | Jan 1, 2010 |
| Total Haloacetic Acids (HAA5) | Yes | Jan 1, 2010 |
| Total Haloacetic Acids (HAA5) | Yes | Jan 1, 2010 |
| Total Haloacetic Acids (HAA5) | Yes | Oct 1, 2009 |
| Total Haloacetic Acids (HAA5) | Yes | Oct 1, 2009 |
| TTHM | Yes | Oct 1, 2009 |
| TTHM | Yes | Oct 1, 2009 |
| TTHM | Yes | Jul 1, 2009 |
| TTHM | Yes | Jul 1, 2009 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2009 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2009 |
| TTHM | Yes | Apr 1, 2009 |
| TTHM | Yes | Apr 1, 2009 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2009 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2009 |
| TTHM | Yes | Jan 1, 2009 |
| TTHM | Yes | Jan 1, 2009 |
| TTHM | Yes | Oct 1, 2008 |
| TTHM | Yes | Oct 1, 2008 |
| Total Haloacetic Acids (HAA5) | Yes | Oct 1, 2008 |
| Total Haloacetic Acids (HAA5) | Yes | Oct 1, 2008 |
| TTHM | Yes | Jul 1, 2008 |
| TTHM | Yes | Jul 1, 2008 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2008 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2008 |
| TTHM | Yes | Apr 1, 2008 |
| TTHM | Yes | Apr 1, 2008 |
Frequently Asked Questions
What does EPA SDWIS list for HOWELL MOUNTAIN MUTUAL WATER COMPANY?
How many people does HOWELL MOUNTAIN MUTUAL WATER COMPANY serve?
What violations does HOWELL MOUNTAIN MUTUAL WATER COMPANY have?
What contaminants have been found in HOWELL MOUNTAIN MUTUAL WATER COMPANY water?
Compare beyond California
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest HOWELL MOUNTAIN MUTUAL WATER COMPANY on cumulative violation count (65) and EPA-reported population served (1,240). Violation-count peers include CAVE SPRINGS WATERWORKS, KAY CO RWD #5 (DALE WATER CORP), LEFLORE CO. RWD #14. Population peers include CANTERBURY PARK, ST MARY PAR JT WATER SEWER COMMISSION 5, JACKPOT WATER SYSTEM.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
Explore More
About This Data
HOWELL MOUNTAIN MUTUAL WATER COMPANY (CA2810001) is drawn from EPA SDWIS. Nearby county systems in this extract include NAPA, CITY OF; AMERICAN CANYON, CITY OF; ST. HELENA, CITY OF; TOWN OF YOUNTVILLE. Health-based rows (65 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.