Public water system record
City of Hanford
Serves Hanford, Kings County, CA · 62,127 people served
Federal records show 4 health-based violations and 1 monitoring/reporting issue for City of Hanford in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.
System profile
- Health-based violations, last 10 years
- 4
- Resolved
- 4
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- City of Hanford draws water from 11 wells.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2021.
- Most recent formal enforcement: compliance order (no penalty) by California, June 2024.
- Record on file since 1980, with 109 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 19,937 service lines.
Check whether City of Hanford 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 |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Apr 1, 2021 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jan 1, 2021 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Oct 1, 2020 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Jul 1, 2020 | Resolved | 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, 2023 | Resolved |
Full record since 1980
EPA's records for City of Hanford go back to 1980. Before October 19, 2016 they list 109 health-based violations (109 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 81 | 0 |
| 1990s | 4 | 0 |
| 2000s | 18 | 0 |
| 2010 to October 18, 2016 | 6 | 1 |
| 2020s | 4 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began October 2014, Resolved.
Show all 109 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0469 mg/L, federal limit 0.01 mg/L (4.7 times the limit)
|
Jul 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0543 mg/L, federal limit 0.01 mg/L (5.4 times the limit)
|
Apr 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0529 mg/L, federal limit 0.01 mg/L (5.3 times the limit)
|
Jan 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.052 mg/L, federal limit 0.01 mg/L (5.2 times the limit)
|
Oct 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.052 mg/L, federal limit 0.01 mg/L (5.2 times the limit)
|
Jul 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.05375 mg/L, federal limit 0.01 mg/L (5.4 times the limit)
|
Apr 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.055 mg/L, federal limit 0.01 mg/L (5.5 times the limit)
|
Jan 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0607 mg/L, federal limit 0.01 mg/L (6.1 times the limit)
|
Oct 1, 2007 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0673 mg/L, federal limit 0.01 mg/L (6.7 times the limit)
|
Jul 1, 2007 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0665 mg/L, federal limit 0.01 mg/L (6.7 times the limit)
|
Apr 1, 2007 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0523 mg/L, federal limit 0.01 mg/L (5.2 times the limit)
|
Jan 1, 2007 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.056 mg/L, federal limit 0.01 mg/L (5.6 times the limit)
|
Oct 1, 2006 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.056 mg/L, federal limit 0.01 mg/L (5.6 times the limit)
|
Jul 1, 2006 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.056 mg/L, federal limit 0.01 mg/L (5.6 times the limit)
|
Apr 1, 2006 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Jan 1, 2006 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1998 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1997 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1997 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Oct 1, 1990 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Dec 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Nov 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Oct 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Sep 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Aug 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Jul 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Jun 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
May 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Apr 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Mar 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Feb 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Jan 1, 1989 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Dec 1, 1988 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Nov 1, 1988 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Oct 1, 1988 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Sep 1, 1988 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Aug 1, 1988 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Jul 1, 1988 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Jun 1, 1988 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Apr 1, 1988 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Mar 1, 1988 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Feb 1, 1988 | Resolved |
59 older violations are not listed here. EPA ECHO has the complete list.
Enforcement actions
California regulators and EPA took 19 formal enforcement actions against City of Hanford between 1985 and 2024, filed as 21 records in EPA's data. The most recent was a compliance order (no penalty) in June 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 27, 2024 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Feb 11, 2021 | California | Compliance order (no penalty) | 4 violations (4 health-based): Total Trihalomethanes (TTHMs) |
| Nov 7, 2014 | California | Compliance order (no penalty) | 5 violations (5 health-based): Total Coliform |
| Feb 20, 2013 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Dec 10, 2009 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Sep 13, 2006 | EPA | Compliance order (no penalty) | 97 violations (97 health-based): Arsenic |
| Nov 1, 2002 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Aug 7, 2000 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Jan 6, 1999 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Sep 30, 1988 | California | Compliance order (no penalty) | 7 violations (7 health-based): Arsenic |
| Sep 30, 1988 | California | Signed compliance agreement | 7 violations (7 health-based): Arsenic |
| Sep 30, 1987 | California | Compliance order (no penalty) | 8 violations (8 health-based): Arsenic |
| Sep 30, 1987 | California | Signed compliance agreement | 8 violations (8 health-based): Arsenic |
| Dec 22, 1986 | California | Compliance order (no penalty) | 2 violations (2 health-based): Arsenic |
| Sep 30, 1986 | California | Compliance order (no penalty) | 9 violations (9 health-based): Arsenic |
| Sep 30, 1986 | California | Signed compliance agreement | 9 violations (9 health-based): Arsenic |
| Jul 3, 1986 | California | Compliance order (no penalty) | 2 violations (2 health-based): Arsenic |
| Sep 30, 1985 | California | Compliance order (no penalty) | 9 violations (9 health-based): Arsenic |
| Sep 30, 1985 | California | Signed compliance agreement | 9 violations (9 health-based): Arsenic |
What the violations mean
Total Trihalomethanes (TTHMs)
4 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
City of Hanford draws water from 11 wells.
Annual water quality report
City of Hanford 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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