Public water system record
Big Sandy Rancheria
Serves Auberry, Fresno County, CA · 408 people served
Federal records show 4 health-based violations and 88 monitoring/reporting issues for Big Sandy Rancheria in the last ten years. The most serious issue in this window was a resolved Combined Uranium violation.
System profile
Source water
Groundwater
ZIP
93602
EPA system ID
090600121
- Health-based violations, last 10 years
- 4
- Resolved
- 4
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 88
Key facts
- Big Sandy Rancheria draws water from 4 wells.
- Highest measured level in the last 10 years: Combined Uranium, 0.13533 mg/L, federal limit 0.03 mg/L (4.5 times the limit), 2025.
- Most recent formal enforcement: signed compliance agreement by EPA, October 2008.
- Record on file since 1991, with 25 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 55 service lines.
Check whether Big Sandy Rancheria 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 |
|---|---|---|---|---|
|
Combined Uranium
Contaminant limit exceeded
Measured 0.13533 mg/L, federal limit 0.03 mg/L (4.5 times the limit)
|
340 | Jan 1, 2025 | Resolved | No |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.0928 mg/L, federal limit 0.03 mg/L (3.1 times the limit)
|
340 | Oct 1, 2024 | Resolved | No |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.13533 mg/L, federal limit 0.03 mg/L (4.5 times the limit)
|
340 | Jul 1, 2024 | Resolved | No |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.1353 mg/L, federal limit 0.03 mg/L (4.5 times the limit)
|
340 | Apr 1, 2024 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Jan 1, 2025 | Active |
|
Public Notice
OTHER
|
Oct 1, 2024 | Active |
|
Public Notice
OTHER
|
Apr 1, 2024 | Active |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2024 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
E. coli
Monitoring and reporting
|
Mar 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2023 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Chlorine
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2022 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2021 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jan 1, 2020 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
E. coli
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Styrene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Toluene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Benzene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Chlordane
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
ETHYLENE DIBROMIDE
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
1,2-DIBROMO-3-CHLOROPROPANE
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Total Polychlorinated Biphenyls (PCB)
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Pentachlorophenol
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Benzo(a)pyrene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
HEXACHLOROBENZENE
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
2,4,5-TP
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
2,4-D
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Heptachlor epoxide
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Heptachlor
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
2,3,7,8-TCDD
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
LASSO
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Atrazine
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Carbofuran
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Dinoseb
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Picloram
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Simazine
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
OXAMYL
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Di(2-ethylhexyl) adipate
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Glyphosate
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Endothall
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Diquat
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Dalapon
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Toxaphene
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Methoxychlor
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
BHC-GAMMA
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Endrin
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Selenium
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Nitrite
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Nitrate
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Mercury
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Fluoride
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Cadmium
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Barium
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Arsenic
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
LASSO
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Nitrite
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Mercury
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
E. coli
Monitoring and reporting
|
Jun 1, 2016 | Resolved |
Full record since 1991
EPA's records for Big Sandy Rancheria go back to 1991. Before October 19, 2016 they list 25 health-based violations (25 resolved) and 38 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 2 | 16 |
| 2000s | 15 | 18 |
| 2010 to October 18, 2016 | 8 | 4 |
| October 19, 2016 to 2019 | 0 | 72 |
| 2020s | 4 | 14 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 2013, Resolved.
Show all 25 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2013 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.03985 mg/L, federal limit 0.03 mg/L (1.3 times the limit)
|
Jul 1, 2011 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.06128 mg/L, federal limit 0.03 mg/L (2 times the limit)
|
Apr 1, 2011 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.06128 mg/L, federal limit 0.03 mg/L (2 times the limit)
|
Jan 1, 2011 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.06915 mg/L, federal limit 0.03 mg/L (2.3 times the limit)
|
Oct 1, 2010 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.06081 mg/L, federal limit 0.03 mg/L (2 times the limit)
|
Jul 1, 2010 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.05134 mg/L, federal limit 0.03 mg/L (1.7 times the limit)
|
Apr 1, 2010 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.0431 mg/L, federal limit 0.03 mg/L (1.4 times the limit)
|
Jan 1, 2010 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.05138 mg/L, federal limit 0.03 mg/L (1.7 times the limit)
|
Oct 1, 2009 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.05138 mg/L, federal limit 0.03 mg/L (1.7 times the limit)
|
Jul 1, 2009 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.05317 mg/L, federal limit 0.03 mg/L (1.8 times the limit)
|
Apr 1, 2009 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.06307 mg/L, federal limit 0.03 mg/L (2.1 times the limit)
|
Jan 1, 2009 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.06307 mg/L, federal limit 0.03 mg/L (2.1 times the limit)
|
Oct 1, 2008 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.06473 mg/L, federal limit 0.03 mg/L (2.2 times the limit)
|
Jul 1, 2008 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.06473 mg/L, federal limit 0.03 mg/L (2.2 times the limit)
|
Apr 1, 2008 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.0487 mg/L, federal limit 0.03 mg/L (1.6 times the limit)
|
Jan 1, 2008 | Resolved |
|
Combined Uranium
Contaminant limit exceeded
Measured 0.0477 mg/L, federal limit 0.03 mg/L (1.6 times the limit)
|
Oct 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2004 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jul 1, 2002 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jun 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1992 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 1992 | Resolved |
Enforcement actions
EPA took 1 formal enforcement action against Big Sandy Rancheria in 2008, filed as 12 records in EPA's data. The most recent was a signed compliance agreement in October 2008.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 6, 2008 | EPA | Signed compliance agreement | 12 violations (12 health-based): Combined Uranium |
What the violations mean
Combined Uranium
4 incidentsTest results for Combined Uranium were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Big Sandy Rancheria draws water from 4 wells.
Annual water quality report
Big Sandy Rancheria 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 Big Sandy Rancheria 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 EPA Region 9.
Certified drinking water labs by state EPA guidance for private wells