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PWS ID	090400302
PWS Name	Avi Casino
PWS Type	Community water system
Owner Type	Tribal Government
Primary Source	Ground water
Primacy Type	Tribal
Is Wholesaler?	No
Population Served	3001
County Served

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	040030245070092025	Open	27-SEP-2025	-	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	040030275750092025	Open	27-SEP-2025	-	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400302450700820250	Open	15-AUG-2025	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400302450700820253	Returned to Compliance	15-AUG-2025	-	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	0400302757500820253	Open	15-AUG-2025	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	0400302757500820250	Open	15-AUG-2025	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	0400302757500820251	Open	15-AUG-2025	-	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400302450700820251	Returned to Compliance	15-AUG-2025	-	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	0400302757500820252	Open	15-AUG-2025	-	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400302450700820252	Returned to Compliance	15-AUG-2025	-	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	040030252500012025	Open	01-JAN-2025	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	040030227099912025	Returned to Compliance	01-JAN-2025	31-MAR-2025	No
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	040030234301492024	Open	01-SEP-2024	-	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003024B800092024	Returned to Compliance	01-SEP-2024	-	No
RPT	Report Sample Result/Fail Monitor (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003024B800082024	Returned to Compliance	01-AUG-2024	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003023A800082024	Returned to Compliance	01-AUG-2024	31-AUG-2024	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	04003023A800062024	Returned to Compliance	01-JUN-2024	30-JUN-2024	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	040030227099942024	Returned to Compliance	01-APR-2024	30-JUN-2024	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400302450700320240	Open	31-MAR-2024	-	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	040030275750032024	Open	31-MAR-2024	-	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400302450700320241	Returned to Compliance	31-MAR-2024	-	Yes
MR	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	0400302665000102023	Open	28-OCT-2023	-	No
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	0400302343014102023	Open	01-OCT-2023	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	0400302270999102023	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400302450700920230	Returned to Compliance	30-SEP-2023	-	Yes
TT	Failure To Address Deficiency	Ground Water Rule	Groundwater Rule	0400302450700920231	Returned to Compliance	30-SEP-2023	-	Yes
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	040030234301482023	Open	01-AUG-2023	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	040030271700072023	Returned to Compliance	01-JUL-2023	-	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	040030203297912023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	040030203298012023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	040030203298112023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	040030203298212023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	040030203298312023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	040030203298412023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	040030203298512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	040030203298712023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	040030203298912023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	040030203299012023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	040030203299112023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	040030203299212023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	040030203299612023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	040030203297612023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	040030203296912023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	040030203296812023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	040030203296412023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	040030203295512023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	040030203238012023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	040030203237812023	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	040030203297712023	Known	01-JAN-2023	31-DEC-2025	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	040030271700072022	Returned to Compliance	01-JUL-2022	-	No

1 - 50 of 249

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
0400302IA12022512325	0400302450700820251	EIA	Federal Violation/Reminder Notice	02-DEC-2025	Region	Informal Violation Report, look for SDWIS-Fed compliance rate after this action to determine change in behavior.
0400302OX11212512320	0400302450700820252	EOX	Federal Compliance achieved	21-NOV-2025	Region	TA provider spoke with well rehabber who confirmed seals were on each well.
0400302OX11212512320	0400302450700820253	EOX	Federal Compliance achieved	21-NOV-2025	Region	TA provider spoke with well rehabber who confirmed seals were on each well.
0400302OX06262512401	0400302450700920230	EOX	Federal Compliance achieved	26-JUN-2025	Region	System submitted photo showing aerator had been removed and replaced with mesh.
0400302IA06112512165	040030227099912025	EIA	Federal Violation/Reminder Notice	11-JUN-2025	Region	Informal Violation Report, look for SDWIS-Fed compliance rate after this action to determine change in behavior.
0400302OX03172512181	0400302450700920231	EOX	Federal Compliance achieved	17-MAR-2025	Region	Photo of screened overflow provided from 2025 sanitary survey.
0400302OX03172512046	0400302450700320241	EOX	Federal Compliance achieved	17-MAR-2025	Region	New gasket documented in 2025 sanitary survey photos.
0400302OX11212411927	04003024B800092024	EOX	Federal Compliance achieved	21-NOV-2024	Region	Report received on 10/21/2024.
0400302OX10212411927	04003023A800082024	EOX	Federal Compliance achieved	21-OCT-2024	Region	September results reported in full on 10/21/2024.
0400302OX10172411927	04003024B800082024	EOX	Federal Compliance achieved	17-OCT-2024	Region	Report received on 10/17/2024.
0400302OX08222411886	040030271700072023	EOX	Federal Compliance achieved	22-AUG-2024	Region	CCR received for violation year with proof of publication and acceptable quality.
0400302OX08052411927	04003023A800062024	EOX	Federal Compliance achieved	05-AUG-2024	Region	July results received on 8/5/2024 with CL2 residuals.
0400302OX08052411927	040030227099942024	EOX	Federal Compliance achieved	05-AUG-2024	Region	July results received on 8/5/2024 with CL2 residuals.
0400302OX01232411689	0400302270999102023	EOX	Federal Compliance achieved	23-JAN-2024	Region	Chlorine residuals reported with January 2024 samples.
0400302OX12222211346	040030271700072022	EOX	Federal Compliance achieved	22-DEC-2022	Region	Submission of required documentation.
0400302OX04212211082	040030203104012021	EOX	Federal Compliance achieved	21-APR-2022	Region	Subsequent reporting of required results.
0400302OX12222111082	040030256500072020	EOX	Federal Compliance achieved	22-DEC-2021	Region	Subsequent reporting of required results.
0400302OX12222110939	040030271700072021	EOX	Federal Compliance achieved	22-DEC-2021	Region	CCR received for violation year with proof of publication and acceptable quality.
0400302OX12222111082	040030253500012021	EOX	Federal Compliance achieved	22-DEC-2021	Region	Subsequent reporting of required results.
0400302OX12222111082	040030253500072020	EOX	Federal Compliance achieved	22-DEC-2021	Region	Subsequent reporting of required results.
0400302OX12222111082	040030253500012020	EOX	Federal Compliance achieved	22-DEC-2021	Region	Subsequent reporting of required results.
0400302OX06172111082	040030252500072020	EOX	Federal Compliance achieved	17-JUN-2021	Region	Subsequent reporting of required results.
0400302OX02042011710	040030203203412020	EOX	Federal Compliance achieved	04-FEB-2020	Region	Lab report submitted late, received 2/4/2020.
0400302OX12191911082	040030253500072019	EOX	Federal Compliance achieved	19-DEC-2019	Region	Subsequent reporting of required results.
0400302OX08251581529	0400302302950102014	EOX	Federal Compliance achieved	25-AUG-2015	Region	sampled 2/10/15
0400302OX08251581530	0400302302456102014	EOX	Federal Compliance achieved	25-AUG-2015	Region	sampled 2/10/15
0400302OX02181577982	040030252500012014	EOX	Federal Compliance achieved	18-FEB-2015	Region	Sampled 11/12/14
0400302OX04051372324	0400302343014112012	EOX	Federal Compliance achieved	05-APR-2013	Region	Only one source was online at the time, but the utility did not report that status with the report.
0400302OX04051372325	0400302223100112012	EOX	Federal Compliance achieved	05-APR-2013	Region	Subsequent reporting of negative results
0400302OX08211270093	040030222310032012	EOX	Federal Compliance achieved	21-AUG-2012	Region	Subsequent compliance with Total Coliform Rule and GWR
0400302OX08211270094	040030234301432012	EOX	Federal Compliance achieved	21-AUG-2012	Region	Subsequent compliance with Total Coliform Rule and GWR
0400302OX03311162750	0400302272950102010	EOX	Federal Compliance achieved	31-MAR-2011	Region	Data received late.
0400302OX03311162751	0400302272456102010	EOX	Federal Compliance achieved	31-MAR-2011	Region	Data received late.
0400302OX03311162748	040030227295072010	EOX	Federal Compliance achieved	31-MAR-2011	Region	Data received late.
0400302OX03311162746	040030227295042010	EOX	Federal Compliance achieved	31-MAR-2011	Region	Data received late.
0400302OX03311162749	040030227245672010	EOX	Federal Compliance achieved	31-MAR-2011	Region	Data received late.
0400302OX03311162747	040030227245642010	EOX	Federal Compliance achieved	31-MAR-2011	Region	Data received late.
0400302OX03211161360	040030223310092010	EOX	Federal Compliance achieved	21-MAR-2011	Region	6 months compliance with TCR
0400302OX07201053666	040030227245612010	EOX	Federal Compliance achieved	20-JUL-2010	Region	Made aware that there was a sample labelling error and that the sampling was completed on time.
0400302OX07201053665	040030227295012010	EOX	Federal Compliance achieved	20-JUL-2010	Region	Made aware that there was a sample labelling error and that the sampling was completed on time.
0400302OX03311048093	040030227245642009	EOX	Federal Compliance achieved	31-MAR-2010	Region	-
0400302OX03311048091	0400302272456102008	EOX	Federal Compliance achieved	31-MAR-2010	Region	-
0400302OX03311048094	040030227295072009	EOX	Federal Compliance achieved	31-MAR-2010	Region	-
0400302OX03311048090	040030227295072008	EOX	Federal Compliance achieved	31-MAR-2010	Region	-
0400302OX03311048092	040030227295042009	EOX	Federal Compliance achieved	31-MAR-2010	Region	-
0400302OX03311048089	040030227245672008	EOX	Federal Compliance achieved	31-MAR-2010	Region	-
0400302OX03311048095	040030227245672009	EOX	Federal Compliance achieved	31-MAR-2010	Region	-
0400302OX03301048061	0400302031040102008	EOX	Federal Compliance achieved	30-MAR-2010	Region	-
0400302OX03301048050	0400302032005102008	EOX	Federal Compliance achieved	30-MAR-2010	Region	-
0400302OX03301048048	0400302032010102008	EOX	Federal Compliance achieved	30-MAR-2010	Region	-

1 - 50 of 214

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
West Well	0400302GW001	Yes	Well	Ground water	Permanent	Active
New Well	0400302GW003	Yes	Well	Ground water	Permanent	Active
East Well	0400302GW002	Yes	Well	Ground water	Permanent	Active
Entry Point to PWS# 0400302 distribution system	0400302EP001	No	Common Headers	-	-	Active
PWS# 0400302 distribution system	0400302DS001	No	Distribution System/Zone	-	-	Active
Common Header for West, East, and New Wells	0400302CH001	No	Other	-	-	Active
Pumping Facility 1	0400302PF001	No	Pump Facility	-	-	Active
Pumping Facility - Fire Pumps	0400302PF003	No	Pump Facility	-	-	Active
Old pumping facility	0400302PF002	No	Pump Facility	-	-	Inactive
Storage Tank	0400302ST001	No	Storage	-	-	Active
Iron and Manganese Treatment Plant	0400302TP002	No	Treatment Plant	-	-	Active
Common header Chlorine Injection point	0400302TP001	No	Treatment Plant	-	-	Inactive

1 - 12 of 12

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
Common header Chlorine Injection point	0400302TP001	Hypochlorination, Pre	Disinfection
Iron and Manganese Treatment Plant	0400302TP002	Hypochlorination, Pre	Manganese removal
Iron and Manganese Treatment Plant	0400302TP002	Filtration, Pressure Sand	Iron removal
Iron and Manganese Treatment Plant	0400302TP002	Hypochlorination, Pre	Disinfection
Iron and Manganese Treatment Plant	0400302TP002	Hypochlorination, Pre	Iron removal
Iron and Manganese Treatment Plant	0400302TP002	Filtration, Pressure Sand	Manganese removal

1 - 6 of 6

For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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