HOLLISTER, CITY OF
PWSID: CA3510001 · Hollister, CA · Serves 26,017 people
According to EPA Safe Drinking Water Information System (SDWIS), HOLLISTER, CITY OF (PWSID CA3510001) in Hollister, CA is listed as a CWS water system covering about 26,017 people. The same extract lists 17 health-based violation records spanning 2015-2022. Those 17 health-based rows for HOLLISTER, CITY OF cover contaminants such as TTHM; they remain historical EPA registry entries, not a current compliance or drinkability score.
HOLLISTER, CITY OF has 17 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. 1 distinct EPA contaminant code appears in this system's record, including TTHM. Recorded violations span 2015–2022. 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)
- CA3510001
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Hollister, CA
- Population Served
- 26,017
- Health Violations
- Yes (17)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| TTHM | 17 | 17 |
Violation History (17)
| Contaminant | Health | Date |
|---|---|---|
| TTHM | Yes | Jul 1, 2022 |
| TTHM | Yes | Jul 1, 2022 |
| TTHM | Yes | Jul 1, 2022 |
| TTHM | Yes | Jul 1, 2022 |
| TTHM | Yes | Jul 1, 2022 |
| TTHM | Yes | Oct 1, 2018 |
| TTHM | Yes | Oct 1, 2018 |
| TTHM | Yes | Oct 1, 2018 |
| TTHM | Yes | Jul 1, 2018 |
| TTHM | Yes | Jul 1, 2018 |
| TTHM | Yes | Jul 1, 2018 |
| TTHM | Yes | Jan 1, 2016 |
| TTHM | Yes | Jan 1, 2016 |
| TTHM | Yes | Jan 1, 2016 |
| TTHM | Yes | Oct 1, 2015 |
| TTHM | Yes | Oct 1, 2015 |
| TTHM | Yes | Oct 1, 2015 |
Frequently Asked Questions
What does EPA SDWIS list for HOLLISTER, CITY OF?
How many people does HOLLISTER, CITY OF serve?
What violations does HOLLISTER, CITY OF have?
What contaminants have been found in HOLLISTER, CITY OF water?
Compare beyond California
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest HOLLISTER, CITY OF on cumulative violation count (17) and EPA-reported population served (26,017). Violation-count peers include Colorado River Regional Water System, SOUTH TONGASS WATER UTILITY, DERMOTT WATERWORKS. Population peers include BURLINGTON MUNICIPAL WATERWORKS, ODENVILLE UTILITIES BOARD, EPCOR - CHAPARRAL CITY.
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
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About This Data
HOLLISTER, CITY OF (CA3510001) is drawn from EPA SDWIS. Nearby county systems in this extract include SUNNYSLOPE COUNTY WATER DIST; SAN JUAN BAUTISTA, CITY OF; THOUSAND TRAILS SAN BENITO PRESERVE; TRES PINOS CWD. Health-based rows (17 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.