Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	WA5312250
PWS Name	CHEHALIS WATER DEPARTMENT
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	Yes
Population Served	11718
County Served	Lewis

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
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	2464454	Returned to Compliance	01-JUL-2024	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	2258944	Returned to Compliance	01-JUL-2022	-	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	06305372042	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	06305362067	Known	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	06305362005	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	06305372005	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	06305372010	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	06305372067	Known	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	06305362959	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	06305372959	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	06305362326	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	06305372326	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	06305362306	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	06305372306	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	06305372274	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	06305362274	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	06305372065	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	06305362065	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	06305372051	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	06305362051	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	06305362050	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	06305372050	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	06305362042	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	06305362039	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	06305372039	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	06305362037	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	06305372037	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	06305372035	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	06305362035	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	06305372020	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	06305362020	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	06305372015	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	06305362015	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	06305362010	Returned to Compliance	01-JUL-2006	30-SEP-2006	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	495237	Known	01-MAY-2005	31-MAY-2005	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	94V0002	Known	01-APR-1994	30-APR-1994	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	94V0001	Known	01-OCT-1993	31-OCT-1993	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9200411	Known	01-APR-1992	30-APR-1992	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8050550	Known	01-OCT-1979	31-OCT-1979	No

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
64454ENF	2464454	SOX	State Compliance achieved	19-FEB-2025	State	-
58944ENF	2258944	SOX	State Compliance achieved	30-JUN-2023	State	-
CM624	06305362015	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362020	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362035	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362037	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362039	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362042	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362050	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362051	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362065	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362274	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362306	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362326	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362010	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362005	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305362959	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372959	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372005	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372010	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372015	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372020	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372035	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372037	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372039	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372042	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372050	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372051	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372065	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372274	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372306	SOX	State Compliance achieved	29-MAR-2007	State	-
CM624	06305372326	SOX	State Compliance achieved	29-MAR-2007	State	-
5976	495237	SIA	State Violation/Reminder Notice	08-MAY-2005	State	-
9204016	9200411	SIF	State Public Notification received	30-APR-1992	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
12200/Centralia (2 Way)	32720	Yes	Consecutive Connection	Ground water	Emergency	Active
N.FORK-NEWAUKUM RIV.	10589	Yes	Intake	Surface water	Permanent	Active
CHEHALIS RIVER	10590	Yes	Intake	Surface water	Permanent	Active
Chehalis WTP	4664	No	Treatment Plant	-	-	Active

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
Chehalis WTP	4664	pH Adjustment, Post	Corrosion control
Chehalis WTP	4664	Fluoridation	Other
Chehalis WTP	4664	Gaseous Chlorination, Post	Disinfection
Chehalis WTP	4664	Coagulation	Particulate removal
Chehalis WTP	4664	Flocculation	Particulate removal
Chehalis WTP	4664	Filtration, Rapid Sand	Particulate removal
Chehalis WTP	4664	Rapid Mix	Particulate removal
Chehalis WTP	4664	Sedimentation	Particulate removal

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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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