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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.

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Violations

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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	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	90059492	Returned to Compliance	01-OCT-2016	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	90059490	Returned to Compliance	01-NOV-2015	30-NOV-2015	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	90059487	Returned to Compliance	01-MAY-2015	31-MAY-2015	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	90059466	Returned to Compliance	01-JAN-2012	31-DEC-2012	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	90059486	Returned to Compliance	01-JAN-2011	31-DEC-2011	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	90059433	Known	01-OCT-2008	31-DEC-2008	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	90059435	Returned to Compliance	25-SEP-2008	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	108	Known	01-JUL-2008	31-JUL-2008	Yes

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Enforcement Actions

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Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
90091322	90059492	SOX	State Compliance achieved	04-SEP-2017	State	-
90091318	90059490	SOX	State Compliance achieved	04-AUG-2016	State	-
90091314	90059487	SOX	State Compliance achieved	11-DEC-2015	State	-
90091304	90059466	SIF	State Public Notification received	11-FEB-2014	State	-
90091305	90059486	SOX	State Compliance achieved	05-OCT-2013	State	-
90091292	90059433	SIE	State Public Notification requested	27-MAR-2009	State	-
2	108	SIE	State Public Notification requested	25-AUG-2008	State	-
1	90059435	SOX	State Compliance achieved	31-JUL-2008	State	Action Resolved via Automatic PN RTC because originating violation was resolved as of 07/31/2008

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All Facilities

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Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
MCKINNEY TO GTUA INSTEAD	34564	Yes	Consecutive Connection	Ground water	Other	Inactive
4 - 1101 MELISSA RD	145654	Yes	Well	Ground water	Permanent	Inactive
2 - PLUGGED	13629	Yes	Well	Ground water	Permanent	Inactive
1 - PLUGGED	13628	Yes	Well	Ground water	Permanent	Inactive
1 - 6 SURREY CIRCLE	170858	Yes	Well	Ground water	Permanent	Active
1 - 6 SURREY CIRCLE	145653	Yes	Well	Ground water	Permanent	Active
SW FROM NORTH TEXAS MWD WYLIE WTP	149837	Yes	Consecutive Connection	Surface water	Permanent	Active
SW FROM NTMWD THRU MCKINNEY AND GTUA	67284	Yes	Consecutive Connection	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	39039	No	Distribution System/Zone	-	-	Active
1901 CENTRAL ST / PS 1 - 1350 GPM - SP	80828	No	Pump Facility	-	-	Active
1901 CENTRAL ST / PS 1 - 1350 GPM - SP	80829	No	Pump Facility	-	-	Active
1901 CENTRAL ST / PS 1 - 1350 GPM - SP	80830	No	Pump Facility	-	-	Active
EP001	133921	No	Sampling Station	-	-	Active
6 SURREY CIRCLE, MELISSA	145658	No	Sampling Station	-	-	Active
6 SURREY CIRCLE, MELISSA	145659	No	Sampling Station	-	-	Active
EP001	49359	No	Sampling Station	-	-	Active
EP002	49358	No	Sampling Station	-	-	Inactive
LAKE LAVON MCKINNEY	61149	No	Sampling Station	-	-	Inactive
1901 CENTRAL ST / PS 1 - 0.75 MG - EL	99678	No	Storage	-	-	Active
1901 CENTRAL ST / PS 1 - 0.5 MG - GR	99679	No	Storage	-	-	Active
PLANT - SURREY CIR	145657	No	Treatment Plant	-	-	Active
PLANT - DENTON / CENTRAL ST	9330	No	Treatment Plant	-	-	Active
PLANT - WELL 2 SOUTH	10959	No	Treatment Plant	-	-	Inactive
CHLORINATOR	2796	No	Treatment Plant	-	-	Inactive

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
PLANT - SURREY CIR	145657	Gaseous Chlorination, Pre	Disinfection
PLANT - SURREY CIR	145657	Chloramines	Disinfection
PLANT - DENTON / CENTRAL ST	9330	Gaseous Chlorination, Pre	Disinfection
PLANT - DENTON / CENTRAL ST	9330	Chloramines	Disinfection

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