LOCKE WATER WORKS CO [SWS]
PWSID: CA3400138 · Walnut Grove, CA · Serves 80 people
According to EPA Safe Drinking Water Information System (SDWIS), LOCKE WATER WORKS CO [SWS] (PWSID CA3400138) in Walnut Grove, CA is listed as a CWS water system covering about 80 people. The same extract lists 8 health-based violation records spanning 2016-2021. Those 8 health-based rows for LOCKE WATER WORKS CO [SWS] cover contaminants such as Arsenic; they remain historical EPA registry entries, not a current compliance or drinkability score.
LOCKE WATER WORKS CO [SWS] has 8 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 Arsenic. Recorded violations span 2016–2021. 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)
- CA3400138
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Walnut Grove, CA
- Population Served
- 80
- Health Violations
- Yes (8)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Arsenic | 8 | 8 |
Violation History (8)
Frequently Asked Questions
What does EPA SDWIS list for LOCKE WATER WORKS CO [SWS]?
How many people does LOCKE WATER WORKS CO [SWS] serve?
What violations does LOCKE WATER WORKS CO [SWS] have?
What contaminants have been found in LOCKE WATER WORKS CO [SWS] water?
Compare beyond California
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest LOCKE WATER WORKS CO [SWS] on cumulative violation count (8) and EPA-reported population served (80). Violation-count peers include Mashantucket Pequot Water System, San Ildefonso Pueblo, TOWAOC WATER SYSTEM.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
Explore More
About This Data
LOCKE WATER WORKS CO [SWS] (CA3400138) is drawn from EPA SDWIS. Nearby county systems in this extract include CITY OF SACRAMENTO MAIN; SACRAMENTO SUBURBAN WATER DISTRICT; SCWA - LAGUNA/VINEYARD; FOLSOM, CITY OF - MAIN. Health-based rows (8 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.