Public water system record
Locke Water Works Co [SWS]
Serves Walnut Grove, Sacramento County, CA · 80 people served
Federal records show 5 health-based violations and 2 monitoring/reporting issues for Locke Water Works Co [SWS] in the last ten years. The most serious issue in this window was a Arsenic violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 5
- Resolved
- 0
- Unresolved
- 0
- Archived by EPA
- 5
- Any acute record
- No
- Monitoring issues, last 10 years
- 2
Key facts
- Locke Water Works Co [SWS] draws water from 1 well.
- Highest measured level in the last 10 years: Arsenic, 25 µg/L, federal limit 10 µg/L (2.5 times the limit), 2017.
- Most recent formal enforcement: compliance order (no penalty) by California, November 2017.
- Record on file since 1980, with 43 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 47 service lines.
Check whether Locke Water Works Co [SWS] serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Arsenic
Contaminant limit exceeded
|
330 | Jan 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
|
330 | Oct 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 25 µg/L, federal limit 10 µg/L (2.5 times the limit)
|
330 | Jul 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0137 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
330 | Jan 1, 2017 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
330 | Oct 1, 2016 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2024 | Active |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2017 |
Active
Enforcement action in place
|
Full record since 1980
EPA's records for Locke Water Works Co [SWS] go back to 1980. Before October 19, 2016 they list 43 health-based violations (8 resolved, 35 archived by EPA without a recorded fix) and 10 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 4 |
| 1990s | 2 | 1 |
| 2000s | 13 | 2 |
| 2010 to October 18, 2016 | 28 | 3 |
| October 19, 2016 to 2019 | 3 | 1 |
| 2020s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Arsenic, began October 2016, Archived.
Show all 43 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Oct 1, 2016 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Jul 1, 2016 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.028 mg/L, federal limit 0.01 mg/L (2.8 times the limit)
|
Apr 1, 2016 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.0297 mg/L, federal limit 0.01 mg/L (3 times the limit)
|
Jan 1, 2016 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.0303 mg/L, federal limit 0.01 mg/L (3 times the limit)
|
Oct 1, 2015 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.031 mg/L, federal limit 0.01 mg/L (3.1 times the limit)
|
Jul 1, 2015 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.02975 mg/L, federal limit 0.01 mg/L (3 times the limit)
|
Apr 1, 2015 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.03 mg/L, federal limit 0.01 mg/L (3 times the limit)
|
Jan 1, 2015 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.03175 mg/L, federal limit 0.01 mg/L (3.2 times the limit)
|
Oct 1, 2014 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.02327 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Jul 1, 2014 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.01688 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Apr 1, 2014 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.032 mg/L, federal limit 0.01 mg/L (3.2 times the limit)
|
Jan 1, 2014 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.029 mg/L, federal limit 0.01 mg/L (2.9 times the limit)
|
Oct 1, 2013 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.02135 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Jul 1, 2013 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.02825 mg/L, federal limit 0.01 mg/L (2.8 times the limit)
|
Apr 1, 2013 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.03175 mg/L, federal limit 0.01 mg/L (3.2 times the limit)
|
Jan 1, 2013 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.03175 mg/L, federal limit 0.01 mg/L (3.2 times the limit)
|
Oct 10, 2012 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.03475 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
|
Jul 1, 2012 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.03575 mg/L, federal limit 0.01 mg/L (3.6 times the limit)
|
Apr 1, 2012 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.03775 mg/L, federal limit 0.01 mg/L (3.8 times the limit)
|
Jan 1, 2012 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.0345 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
|
Oct 1, 2011 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.02875 mg/L, federal limit 0.01 mg/L (2.9 times the limit)
|
Jul 1, 2011 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.02025 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Apr 1, 2011 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.01825 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jan 1, 2011 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Oct 1, 2010 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.01565 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
Jul 1, 2010 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.0178 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Apr 1, 2010 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.01655 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Jan 1, 2010 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.01274 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Oct 10, 2009 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.01738 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Jul 1, 2009 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.029 mg/L, federal limit 0.01 mg/L (2.9 times the limit)
|
Apr 1, 2009 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.0258 mg/L, federal limit 0.01 mg/L (2.6 times the limit)
|
Jan 1, 2009 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.03 mg/L, federal limit 0.01 mg/L (3 times the limit)
|
Oct 1, 2008 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Jul 1, 2008 | Archived |
|
Arsenic
Contaminant limit exceeded
Measured 0.03 mg/L, federal limit 0.01 mg/L (3 times the limit)
|
Apr 1, 2008 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Mar 1, 2001 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 2001 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 1999 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1999 | Resolved |
Enforcement actions
California regulators took 6 formal enforcement actions against Locke Water Works Co [SWS] between 2008 and 2017, filed as 8 records in EPA's data. The most recent was a compliance order (no penalty) in November 2017.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Nov 8, 2017 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Dec 31, 2015 | California | Compliance order (no penalty) | 15 violations (15 health-based): Arsenic |
| Jan 28, 2014 | California | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
| Nov 2, 2010 | California | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
| Nov 25, 2009 | California | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
| Oct 29, 2008 | California | Compliance order (no penalty) | 55 violations (55 health-based): Arsenic |
What the violations mean
Arsenic
5 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
Where the water comes from
Locke Water Works Co [SWS] draws water from 1 well.
Annual water quality report
Locke Water Works Co [SWS] must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Locke Water Works Co [SWS] for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by California.
Certified drinking water labs by state EPA guidance for private wells