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PWS ID	CO0107701
PWS Name	SAN LAZARO MFCTD HOUSING COMMUNITY
PWS Type	Community water system
Owner Type	Private
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	844
County Served	Boulder

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
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002178	Returned to Compliance	01-FEB-2026	28-FEB-2026	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002179	Returned to Compliance	01-FEB-2026	28-FEB-2026	No
Other	Sample Siting Plan Errors (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	3002177	Returned to Compliance	23-OCT-2025	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	3002172	Returned to Compliance	01-JUL-2025	30-SEP-2025	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	3002173	Returned to Compliance	01-JUL-2025	30-SEP-2025	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002171	Returned to Compliance	01-APR-2025	30-APR-2025	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002170	Returned to Compliance	01-APR-2025	30-APR-2025	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002167	Returned to Compliance	01-OCT-2024	31-OCT-2024	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002168	Returned to Compliance	01-OCT-2024	31-OCT-2024	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002165	Returned to Compliance	01-JAN-2024	31-JAN-2024	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002166	Returned to Compliance	01-JAN-2024	31-JAN-2024	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002163	Returned to Compliance	01-DEC-2023	31-DEC-2023	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002164	Returned to Compliance	01-DEC-2023	31-DEC-2023	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002161	Returned to Compliance	01-OCT-2023	31-OCT-2023	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002162	Returned to Compliance	01-OCT-2023	31-OCT-2023	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002156	Returned to Compliance	01-MAY-2023	31-MAY-2023	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002157	Returned to Compliance	01-MAY-2023	31-MAY-2023	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	3002159	Returned to Compliance	01-APR-2023	30-JUN-2023	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002132	Returned to Compliance	01-AUG-2022	31-AUG-2022	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002131	Returned to Compliance	01-JUL-2022	31-JUL-2022	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002130	Returned to Compliance	01-JUN-2022	30-JUN-2022	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002126	Returned to Compliance	01-MAY-2022	31-MAY-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	3002128	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	3002129	Returned to Compliance	01-APR-2022	30-JUN-2022	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3002125	Returned to Compliance	01-APR-2022	30-APR-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	3002134	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	3002147	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Trichloroethylene	3002146	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	3002145	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Carbon tetrachloride	3002144	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,1-Trichloroethane	3002143	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloroethane	3002142	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	3002141	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1-Dichloroethylene	3002140	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Vinyl chloride	3002139	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	p-Dichlorobenzene	3002138	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	3002137	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	3002136	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	3002135	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	3002123	Returned to Compliance	01-JAN-2022	31-MAR-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	3002149	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Benzene	3002150	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	3002151	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	3002152	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	3002153	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	3002124	Returned to Compliance	01-JAN-2022	31-MAR-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2,4-Trichlorobenzene	3002133	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	3002148	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	3002121	Returned to Compliance	01-DEC-2021	31-DEC-2021	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	3002122	Returned to Compliance	01-DEC-2021	31-DEC-2021	No

1 - 50 of 154

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
3002826	3002178	SIE	State Public Notification requested	12-MAR-2026	State	-
3002828	3002179	SIE	State Public Notification requested	12-MAR-2026	State	-
3002823	3002177	SOX	State Compliance achieved	20-FEB-2026	State	-
3002820	3002172	SOX	State Compliance achieved	14-NOV-2025	State	SOX 4Q 2025 DBP samples reported
3002820	3002173	SOX	State Compliance achieved	14-NOV-2025	State	SOX 4Q 2025 DBP samples reported
3002809	3002170	SOX	State Compliance achieved	13-MAY-2025	State	SOX MOR reported in accordance with the rule FCL 7/22/2025
3002809	3002171	SOX	State Compliance achieved	13-MAY-2025	State	SOX MOR reported in accordance with the rule FCL 7/22/2025
3002801	3002168	SIE	State Public Notification requested	21-NOV-2024	State	-
3002799	3002167	SIE	State Public Notification requested	21-NOV-2024	State	-
3002794	3002165	SIE	State Public Notification requested	15-FEB-2024	State	-
3002796	3002166	SIE	State Public Notification requested	15-FEB-2024	State	-
3002790	3002164	SIE	State Public Notification requested	17-JAN-2024	State	-
3002788	3002163	SIE	State Public Notification requested	17-JAN-2024	State	-
3002786	3002162	SOX	State Compliance achieved	10-DEC-2023	State	SOX MOR reported 12/10/2023 FCL
3002786	3002161	SOX	State Compliance achieved	10-DEC-2023	State	SOX MOR reported 12/10/2023 FCL
3002780	3002143	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002144	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002145	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002146	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002147	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002148	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002149	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002150	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002151	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002152	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002153	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002140	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002139	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002142	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002141	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002138	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002137	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002136	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002135	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002133	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002780	3002134	SOX	State Compliance achieved	07-SEP-2023	State	VOC monitored in 2023. slh 10/12/2023
3002791	3002159	SOX	State Compliance achieved	10-AUG-2023	State	SOX DBP Precursors reported 8/10/2023 FCL
3002785	3002157	SOX	State Compliance achieved	10-JUL-2023	State	SOX MOR reported 7/10/2023 FCL
3002785	3002156	SOX	State Compliance achieved	10-JUL-2023	State	SOX MOR reported 7/10/2023 FCL
3002759	3002131	SIE	State Public Notification requested	26-SEP-2022	State	-
3002761	3002132	SIE	State Public Notification requested	26-SEP-2022	State	-
3002755	3002128	SOX	State Compliance achieved	10-AUG-2022	State	-
3002755	3002124	SOX	State Compliance achieved	10-AUG-2022	State	-
3002755	3002123	SOX	State Compliance achieved	10-AUG-2022	State	-
3002755	3002129	SOX	State Compliance achieved	10-AUG-2022	State	-
3002756	3002125	SOX	State Compliance achieved	04-AUG-2022	State	-
3002757	3002130	SOX	State Compliance achieved	04-AUG-2022	State	-
3002757	3002126	SOX	State Compliance achieved	04-AUG-2022	State	-
3002744	3002122	SOX	State Compliance achieved	31-JAN-2022	State	-
3002744	3002121	SOX	State Compliance achieved	31-JAN-2022	State	-

1 - 50 of 154

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
PURCHASED WATER FROM CITY OF BOULDER	15740	Yes	Consecutive Connection	Surface water	Emergency	Active
KLINES POND	102	Yes	Intake	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	6500	No	Distribution System/Zone	-	-	Active
COMBINED RAW SOURCE	14115	No	Sampling Station	-	-	Active
SAMPLE STATION CL2 MONITORING SHED	24364	No	Sampling Station	-	-	Active
STORAGE TANK	13126	No	Storage	-	-	Active
SAN LAZARO SWTP01	3450	No	Treatment Plant	-	-	Active

1 - 7 of 7

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
SAN LAZARO SWTP01	3450	Coagulation	Particulate removal
SAN LAZARO SWTP01	3450	Permanganate	Taste / odor control
SAN LAZARO SWTP01	3450	Flocculation	Particulate removal
SAN LAZARO SWTP01	3450	Sedimentation	Particulate removal
SAN LAZARO SWTP01	3450	Filtration, Rapid Sand	Particulate removal
SAN LAZARO SWTP01	3450	Hypochlorination, Post	Disinfection
SAN LAZARO SWTP01	3450	Innovative	Disinfection

1 - 7 of 7

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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