BLALOCK ORCHARD DIST 10

Washington — Community Water System — PWSID: WA5307350

System Information

PWSID	WA5307350
System Name	BLALOCK ORCHARD DIST 10
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Local
EPA Region	10
Serves School	No
Wholesaler	No
First Reported	Feb 7, 1981
Last Reported	Dec 11, 2025

Location & Contact

State	Washington
City	Walla Walla
ZIP Code	99362
Address	PO Box 392
Organization	BLALOCK ORCHARD DIST 10
Phone	—

Population & Service

Population Served	250
Service Connections	91

Drinking Water Violations (57)

This water system has 57 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Contaminant	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Jul 1, 2024	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Oct 1, 2024	Consumer Confidence Rule
Jul 1, 2013	Sep 30, 2013	2,4,5-TP	MR	No	Yes	—	0.05 mg/L	—	Resolved	Sep 30, 2013	Synthetic Organic Chemicals
Jul 1, 2013	Sep 30, 2013	Dalapon	MR	No	Yes	—	0.2 mg/L	—	Resolved	Sep 30, 2013	Synthetic Organic Chemicals
Jul 1, 2013	Sep 30, 2013	Dinoseb	MR	No	Yes	—	0.007 mg/L	—	Resolved	Sep 30, 2013	Synthetic Organic Chemicals
Jul 1, 2013	Sep 30, 2013	Picloram	MR	No	Yes	—	0.5 mg/L	—	Resolved	Sep 30, 2013	Synthetic Organic Chemicals
Jul 1, 2013	Sep 30, 2013	Pentachlorophenol	MR	No	Yes	—	0.001 mg/L	—	Resolved	Sep 30, 2013	Synthetic Organic Chemicals
Jan 1, 2011	Dec 31, 2011	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2011	Nitrate Rule
Jan 1, 2009	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2009	Lead and Copper Rule
Jan 1, 2009	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2009	Lead and Copper Rule
Jan 1, 2009	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2009	Lead and Copper Rule
Jan 1, 2009	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2009	Lead and Copper Rule
Jan 1, 2009	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2009	Lead and Copper Rule
Jan 1, 2009	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2009	Lead and Copper Rule
Jan 1, 2009	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2009	Lead and Copper Rule
Jan 1, 2009	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2009	Lead and Copper Rule
Jan 1, 2009	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2009	Lead and Copper Rule
Jan 1, 2009	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2009	Lead and Copper Rule
Jan 1, 2005	Dec 31, 2005	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2005	Nitrate Rule
Jan 1, 2005	Dec 31, 2005	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2005	Nitrate Rule
Jan 1, 2005	Dec 31, 2005	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2005	Nitrate Rule
Jan 1, 2005	Dec 31, 2005	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2005	Nitrate Rule
Jan 1, 2005	Dec 31, 2005	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2005	Nitrate Rule
Jan 1, 2005	Dec 31, 2005	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2005	Nitrate Rule
Jan 1, 2005	Dec 31, 2005	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2005	Nitrate Rule
Sep 1, 2003	Sep 30, 2003	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Sep 30, 2003	Total Coliform Rule
Jan 1, 2002	Dec 31, 2004	1,2-Dichloroethane	MR	No	Yes	—	0.005 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	cis-1,2-Dichloroethylene	MR	No	Yes	—	0.07 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	CHLOROBENZENE	MR	No	Yes	—	0.1 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Tetrachloroethylene	MR	No	Yes	—	0.005 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	1,2-Dichloropropane	MR	No	Yes	—	0.005 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Toluene	MR	No	Yes	—	1 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Carbon tetrachloride	MR	No	Yes	—	0.005 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	trans-1,2-Dichloroethylene	MR	No	Yes	—	0.1 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Styrene	MR	No	Yes	—	0.1 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	1,1-Dichloroethylene	MR	No	Yes	—	0.007 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	1,1,2-Trichloroethane	MR	No	Yes	—	0.005 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	o-Dichlorobenzene	MR	No	Yes	—	0.6 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	p-Dichlorobenzene	MR	No	Yes	—	0.075 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	1,2,4-Trichlorobenzene	MR	No	Yes	—	0.07 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	1,1,1-Trichloroethane	MR	No	Yes	—	0.2 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	DICHLOROMETHANE	MR	No	Yes	—	0.005 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Benzene	MR	No	Yes	—	0.005 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Ethylbenzene	MR	No	Yes	—	0.7 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Jan 1, 2002	Dec 31, 2004	Trichloroethylene	MR	No	Yes	—	0.005 mg/L	—	Archived	Dec 31, 2004	Volatile Organic Chemicals
Oct 1, 1998	Oct 31, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 1998	Total Coliform Rule
Oct 1, 1998	Oct 31, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 1998	Total Coliform Rule
Oct 1, 1998	Oct 31, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 1998	Total Coliform Rule
Oct 1, 1998	Oct 31, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 1998	Total Coliform Rule
Sep 1, 1998	Sep 30, 1998	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	Sep 30, 1998	Total Coliform Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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