COBLES CORNER
PWSID: CA5000033 · Hughson, CA · Serves 50 people
According to EPA Safe Drinking Water Information System (SDWIS), COBLES CORNER (PWSID CA5000033) in Hughson, CA is listed as a CWS water system covering about 50 people. The same extract lists 45 health-based violation records spanning 1997-2025. Those 45 health-based rows for COBLES CORNER cover contaminants such as Arsenic, Coliform (TCR); they remain historical EPA registry entries, not a current compliance or drinkability score.
COBLES CORNER has 45 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 Arsenic, Coliform (TCR). Recorded violations span 1997–2025. 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)
- CA5000033
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Hughson, CA
- Population Served
- 50
- Health Violations
- Yes (45)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Arsenic | 44 | 44 |
| Coliform (TCR) | 1 | 1 |
Violation History (45)
| Contaminant | Health | Date |
|---|---|---|
| Arsenic | Yes | Jul 1, 2025 |
| Arsenic | Yes | Apr 1, 2025 |
| Arsenic | Yes | Jan 1, 2025 |
| Arsenic | Yes | Oct 1, 2024 |
| Arsenic | Yes | Oct 1, 2024 |
| Arsenic | Yes | Jul 1, 2024 |
| Arsenic | Yes | Jul 1, 2024 |
| Arsenic | Yes | Apr 1, 2024 |
| Arsenic | Yes | Apr 1, 2024 |
| Arsenic | Yes | Apr 1, 2023 |
| Arsenic | Yes | Apr 1, 2023 |
| Arsenic | Yes | Jan 1, 2023 |
| Arsenic | Yes | Jan 1, 2023 |
| Arsenic | Yes | Oct 1, 2022 |
| Arsenic | Yes | Oct 1, 2022 |
| Arsenic | Yes | Jul 1, 2022 |
| Arsenic | Yes | Jul 1, 2022 |
| Arsenic | Yes | Apr 1, 2022 |
| Arsenic | Yes | Apr 1, 2022 |
| Arsenic | Yes | Jan 1, 2022 |
| Arsenic | Yes | Oct 1, 2021 |
| Arsenic | Yes | Jul 1, 2021 |
| Arsenic | Yes | Apr 1, 2021 |
| Arsenic | Yes | Jan 1, 2021 |
| Arsenic | Yes | Oct 1, 2020 |
| Arsenic | Yes | Jul 1, 2020 |
| Arsenic | Yes | Apr 1, 2020 |
| Arsenic | Yes | Jan 1, 2020 |
| Arsenic | Yes | Oct 1, 2019 |
| Arsenic | Yes | Jul 1, 2019 |
| Arsenic | Yes | Apr 1, 2019 |
| Arsenic | Yes | Jan 1, 2019 |
| Arsenic | Yes | Oct 1, 2018 |
| Arsenic | Yes | Jul 1, 2018 |
| Arsenic | Yes | Apr 1, 2018 |
| Arsenic | Yes | Jan 1, 2018 |
| Arsenic | Yes | Oct 1, 2017 |
| Arsenic | Yes | Jul 1, 2017 |
| Arsenic | Yes | Apr 1, 2017 |
| Arsenic | Yes | Jan 1, 2017 |
| Arsenic | Yes | Oct 1, 2016 |
| Arsenic | Yes | Jul 1, 2016 |
| Arsenic | Yes | Apr 1, 2016 |
| Arsenic | Yes | Jan 1, 2016 |
| Coliform (TCR) | Yes | Feb 1, 1997 |
Frequently Asked Questions
What does EPA SDWIS list for COBLES CORNER?
How many people does COBLES CORNER serve?
What violations does COBLES CORNER have?
What contaminants have been found in COBLES CORNER water?
Compare beyond California
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest COBLES CORNER on cumulative violation count (45) and EPA-reported population served (50). Violation-count peers include MAKAH NEAH BAY, EPCOR - LAKESIDE, HOMESTEAD WC.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
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About This Data
COBLES CORNER (CA5000033) is drawn from EPA SDWIS. Nearby county systems in this extract include MODESTO, CITY OF; TURLOCK, CITY OF; CERES, CITY OF; PATTERSON, CITY OF. Health-based rows (45 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.