Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CO0134530
PWS Name	LAKE DURANGO WA
PWS Type	Community water system
Owner Type	Private
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	Yes
Population Served	1577
County Served	La Plata

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	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	4008753	Returned to Compliance	08-JUL-2022	-	No
TT	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Stage 1 Disinfectants and Disinfection Byproducts Rule	4008752	Returned to Compliance	01-JUN-2022	-	Yes
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	4008754	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	4008751	Returned to Compliance	01-JAN-2021	31-DEC-2021	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	4008749	Returned to Compliance	01-OCT-2020	31-OCT-2020	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	4008748	Returned to Compliance	01-OCT-2019	31-OCT-2019	No
MR	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4008747	Returned to Compliance	10-SEP-2019	-	No
MR	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4008746	Returned to Compliance	24-APR-2019	-	No
MR	Failure Submit IDSE/Subpart V Plan Rpt	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4008745	Returned to Compliance	14-JAN-2019	-	No
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	4008743	Returned to Compliance	01-OCT-2018	31-OCT-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4008744	Returned to Compliance	01-OCT-2018	31-DEC-2018	Yes
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	4008735	Returned to Compliance	01-OCT-2018	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine dioxide	4008740	Returned to Compliance	01-SEP-2018	30-SEP-2018	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	4008737	Returned to Compliance	01-SEP-2018	30-SEP-2018	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine dioxide	4008741	Returned to Compliance	01-AUG-2018	31-AUG-2018	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	4008738	Returned to Compliance	01-AUG-2018	31-AUG-2018	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4008736	Returned to Compliance	01-JUL-2018	30-SEP-2018	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	4008739	Returned to Compliance	01-JUL-2018	31-JUL-2018	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine dioxide	4008742	Returned to Compliance	01-JUL-2018	31-JUL-2018	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	4008734	Returned to Compliance	01-APR-2018	30-APR-2018	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4008733	Returned to Compliance	01-APR-2018	30-JUN-2018	Yes
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	4008732	Returned to Compliance	01-JAN-2018	31-DEC-2018	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4008731	Returned to Compliance	01-JAN-2018	31-MAR-2018	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4008730	Returned to Compliance	01-JUL-2015	30-SEP-2015	Yes
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	4008728	Returned to Compliance	01-JUL-2014	31-JUL-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	4008729	Returned to Compliance	01-JUL-2014	30-SEP-2014	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	4008727	Returned to Compliance	01-JUL-2014	31-JUL-2014	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	4008724	Returned to Compliance	01-JUN-2014	30-JUN-2014	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	4008726	Returned to Compliance	01-JUN-2014	30-JUN-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	4008725	Returned to Compliance	01-APR-2014	30-JUN-2014	No
TT	Single Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	4008723	Returned to Compliance	01-JUL-2012	31-JUL-2012	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	4008722	Returned to Compliance	01-APR-2012	30-APR-2012	No
TT	Single Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	4008721	Returned to Compliance	01-JUN-2011	30-JUN-2011	Yes
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	4008717	Returned to Compliance	01-MAY-2010	31-MAY-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4008715	Returned to Compliance	01-JAN-2010	31-MAR-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	4008714	Returned to Compliance	01-JAN-2010	31-MAR-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	4008716	Returned to Compliance	01-JAN-2010	31-JAN-2010	No
TT	Single Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	4008713	Returned to Compliance	01-FEB-2009	28-FEB-2009	Yes
MR	Monitoring, Source Water (LT2)	Long Term 2 Enhanced Surface Water Treatment Rule	E. COLI	4008712	Returned to Compliance	01-NOV-2008	30-NOV-2008	No
MR	Monitoring, Routine (IDSE)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Stage 2 Disinfectants and Disinfection Byproducts Rule	4008710	Returned to Compliance	01-APR-2008	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorite	4008709	Returned to Compliance	01-NOV-2007	30-NOV-2007	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	4008708	Returned to Compliance	01-OCT-2007	-	No
TT	Single Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	4008707	Returned to Compliance	01-AUG-2007	31-AUG-2007	Yes
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	4008607	Returned to Compliance	01-AUG-2007	31-AUG-2007	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	4008306	Returned to Compliance	01-JUL-2006	31-JUL-2006	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	4008105	Returned to Compliance	01-JUL-2005	31-JUL-2005	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	4007404	Returned to Compliance	01-APR-2004	30-APR-2004	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	4007304	Returned to Compliance	01-MAR-2004	31-MAR-2004	Yes
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	4007805	Returned to Compliance	01-JAN-2004	31-DEC-2004	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	1004202	Returned to Compliance	01-DEC-2001	31-DEC-2001	Yes

1 - 50 of 54

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
4036726	4008751	SOX	State Compliance achieved	05-APR-2023	State	-
4036726	4008754	SOX	State Compliance achieved	05-APR-2023	State	-
4036725	4008752	SIF	State Public Notification received	02-NOV-2022	State	-
4036724	4008753	SOX	State Compliance achieved	01-NOV-2022	State	PN performed. ORC was resolved. second round of PN not required. BJK
4036715	4008749	SOX	State Compliance achieved	23-APR-2021	State	-
4036709	4008748	SIE	State Public Notification requested	06-FEB-2020	State	-
4036705	4008747	SIE	State Public Notification requested	02-OCT-2019	State	-
4036706	4008746	SOX	State Compliance achieved	16-SEP-2019	State	-
4036707	4008745	SOX	State Compliance achieved	16-SEP-2019	State	-
4036703	4008732	SOX	State Compliance achieved	22-JUL-2019	State	RTC by collecting sample in 2Q2019.
4036700	4008744	SOX	State Compliance achieved	16-APR-2019	State	RTC with one quarter of no MCL violation. ejc
4036700	4008736	SOX	State Compliance achieved	16-APR-2019	State	RTC with one quarter of no MCL violation. ejc
4036700	4008733	SOX	State Compliance achieved	16-APR-2019	State	RTC with one quarter of no MCL violation. ejc
4036700	4008731	SOX	State Compliance achieved	16-APR-2019	State	RTC with one quarter of no MCL violation. ejc
4036693	4008742	SOX	State Compliance achieved	16-JAN-2019	State	RTC with next quarters' report. ejc
4036693	4008737	SOX	State Compliance achieved	16-JAN-2019	State	RTC with next quarters' report. ejc
4036693	4008738	SOX	State Compliance achieved	16-JAN-2019	State	RTC with next quarters' report. ejc
4036693	4008739	SOX	State Compliance achieved	16-JAN-2019	State	RTC with next quarters' report. ejc
4036693	4008741	SOX	State Compliance achieved	16-JAN-2019	State	RTC with next quarters' report. ejc
4036693	4008740	SOX	State Compliance achieved	16-JAN-2019	State	RTC with next quarters' report. ejc
4036692	4008743	SOX	State Compliance achieved	17-DEC-2018	State	RTC with next month's MOR. ejc
4036685	4008735	SOX	State Compliance achieved	16-OCT-2018	State	RTC by submitting LCR data late. ejc
4036689	4008734	SOX	State Compliance achieved	30-SEP-2018	State	RTC with next quarter's samples. ejc
4036668	4008730	SOX	State Compliance achieved	31-MAR-2016	State	RTC with 2 consecutive quarters in compliance. ejc
4036664	4008726	SOX	State Compliance achieved	26-FEB-2015	State	RTC with 6-mo consecutive compliance. ejc
4036664	4008729	SOX	State Compliance achieved	26-FEB-2015	State	RTC with 6-mo consecutive compliance. ejc
4036664	4008728	SOX	State Compliance achieved	26-FEB-2015	State	RTC with 6-mo consecutive compliance. ejc
4036664	4008727	SOX	State Compliance achieved	26-FEB-2015	State	RTC with 6-mo consecutive compliance. ejc
4036664	4008725	SOX	State Compliance achieved	26-FEB-2015	State	RTC with 6-mo consecutive compliance. ejc
4036664	4008724	SOX	State Compliance achieved	26-FEB-2015	State	RTC with 6-mo consecutive compliance. ejc
4036659	4008723	SIF	State Public Notification received	08-JUL-2013	State	2013 CCR
4036659	4008722	SIF	State Public Notification received	08-JUL-2013	State	2013 CCR
4036650	4008721	SOX	State Compliance achieved	31-DEC-2011	State	implicit rtc, sv 3/5/12
4036646	4008717	SIF	State Public Notification received	16-MAY-2011	State	PN included with CCR. mnm 6/7/11
4036646	4008716	SIF	State Public Notification received	16-MAY-2011	State	PN included with CCR. mnm 6/7/11
4036646	4008714	SIF	State Public Notification received	16-MAY-2011	State	PN included with CCR. mnm 6/7/11
4036646	4008715	SIF	State Public Notification received	16-MAY-2011	State	PN included with CCR. mnm 6/7/11
4036629	4008712	SOX	State Compliance achieved	10-AUG-2009	State	rec'd resample for 11/4/08, taken on 12/17/08, received 8/10/09 bp2
4036628	4008708	SOX	State Compliance achieved	06-AUG-2009	State	RTC w/ receipt of 2008 samples
4036626	4008710	SOX	State Compliance achieved	22-APR-2009	State	System submitted IDSE Plan 4/22/09 jkc
4036643	4008713	SOX	State Compliance achieved	03-APR-2009	State	per new ERG, system RTC after one round, sv 11/5/2010
4036616	4007093	SOX	State Compliance achieved	25-AUG-2008	State	rec'd 0708, sv 8/25/08
4036616	4007293	SOX	State Compliance achieved	25-AUG-2008	State	rec'd 0708, sv 8/25/08
4036616	4007193	SOX	State Compliance achieved	25-AUG-2008	State	rec'd 0708, sv 8/25/08
4036618	4008709	SIF	State Public Notification received	07-JUL-2008	State	-
4036614	4008607	SOX	State Compliance achieved	29-FEB-2008	State	ESX - implicit RTC due to 6 mos compliance
4036614	4008707	SOX	State Compliance achieved	29-FEB-2008	State	ESX - implicit RTC due to 6 mos compliance
4036207	4008306	SOX	State Compliance achieved	11-MAY-2007	State	>6 months compliant
4035607	4005801	SOX	State Compliance achieved	05-FEB-2007	State	> 6 months compliant 2/5/07 sp
4035607	4007404	SOX	State Compliance achieved	05-FEB-2007	State	> 6 months compliant 2/5/07 sp

1 - 50 of 54

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
LAKE DURANGO RESERVOIR	372	Yes	Intake	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	6933	No	Distribution System/Zone	-	-	Active
LAKE DURANGO WATER TANK	1223	No	Storage	-	-	Active
SHENANDOAH TANK	14569	No	Storage	-	-	Active
RAFTER J TANK	14570	No	Storage	-	-	Active
KING MOUNTAIN TANK	17330	No	Storage	-	-	Active
MORNINGSTAR/BROWNS LAKE TANK	17331	No	Storage	-	-	Active
TRAPPERS CROSSING TANK	20093	No	Storage	-	-	Active
TREATMENT IN LAKE DURANGO RES	17332	No	Treatment Plant	-	-	Active
LAKE DURANGO SWTP	4101	No	Treatment Plant	-	-	Active
NEPTUNE SWTP02 UNIT FILTER NO 1	4100	No	Treatment Plant	-	-	Inactive

1 - 11 of 11

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT IN LAKE DURANGO RES	17332	Aeration, Cascade	Iron removal
TREATMENT IN LAKE DURANGO RES	17332	Algae Control	Organics removal
NEPTUNE SWTP02 UNIT FILTER NO 1	4100	Coagulation	Particulate removal
NEPTUNE SWTP02 UNIT FILTER NO 1	4100	Filtration, Rapid Sand	Particulate removal
NEPTUNE SWTP02 UNIT FILTER NO 1	4100	Chlorine Dioxide	Disinfection
NEPTUNE SWTP02 UNIT FILTER NO 1	4100	Rapid Mix	Particulate removal
NEPTUNE SWTP02 UNIT FILTER NO 1	4100	Algae Control	Taste / odor control
NEPTUNE SWTP02 UNIT FILTER NO 1	4100	Flocculation	Particulate removal
NEPTUNE SWTP02 UNIT FILTER NO 1	4100	Gaseous Chlorination, Pre	Disinfection
NEPTUNE SWTP02 UNIT FILTER NO 1	4100	Permanganate	Iron removal
NEPTUNE SWTP02 UNIT FILTER NO 1	4100	pH Adjustment, Post	Corrosion control
LAKE DURANGO SWTP	4101	Innovative	Disinfection
LAKE DURANGO SWTP	4101	Gaseous Chlorination, Post	Disinfection
LAKE DURANGO SWTP	4101	Innovative	Corrosion control
LAKE DURANGO SWTP	4101	Innovative	Particulate removal
LAKE DURANGO SWTP	4101	Innovative	Particulate removal
LAKE DURANGO SWTP	4101	Coagulation	Particulate removal
LAKE DURANGO SWTP	4101	Chlorine Dioxide	Disinfection
LAKE DURANGO SWTP	4101	Rapid Mix	Particulate removal
LAKE DURANGO SWTP	4101	Filtration, Rapid Sand	Particulate removal
LAKE DURANGO SWTP	4101	Algae Control	Taste / odor control
LAKE DURANGO SWTP	4101	Flocculation	Particulate removal
LAKE DURANGO SWTP	4101	Gaseous Chlorination, Pre	Disinfection
LAKE DURANGO SWTP	4101	Permanganate	Iron removal
LAKE DURANGO SWTP	4101	pH Adjustment, Post	Corrosion control

1 - 25 of 25

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.

Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Nav Menu

Your Drinking Water Query results from SDWIS Fed Reporting Services

Note

PWS Violation

Violations

Column Actions

Enforcement Actions

Enforcement Actions

Column Actions

PWS Facilities

All Facilities

Column Actions

PWS Treatment Processes

Treatment Processes

Column Actions