Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CO0103005
PWS Name	AURORA CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	533407
County Served	Arapahoe

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 and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	4025	Returned to Compliance	01-JAN-2016	31-MAR-2016	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	4024	Returned to Compliance	01-JAN-2016	31-MAR-2016	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	3924	Returned to Compliance	01-MAY-2011	31-MAY-2011	No
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	3909	Returned to Compliance	01-JAN-2011	31-JAN-2011	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	902	Returned to Compliance	01-APR-2002	30-JUN-2002	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	802	Returned to Compliance	01-APR-2002	30-JUN-2002	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
2023	4025	SIF	State Public Notification received	07-JUN-2017	State	-
2023	4024	SIF	State Public Notification received	07-JUN-2017	State	-
2019	3924	SOX	State Compliance achieved	30-DEC-2011	State	-
2017	3909	SOX	State Compliance achieved	31-JUL-2011	State	-
402	902	SOX	State Compliance achieved	01-JUL-2002	State	-
402	802	SOX	State Compliance achieved	01-JUL-2002	State	-

1 - 6 of 6

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
PURCHASED FROM CO0116001	26136	Yes	Consecutive Connection	Surface water	Permanent	Active
NO 7 WELL	1526	Yes	Well	Ground water	Permanent	Inactive
NO 6 WELL	1525	Yes	Well	Ground water	Permanent	Inactive
NO 5 WELL	1524	Yes	Well	Ground water	Permanent	Inactive
NO 4 WELL	1523	Yes	Well	Ground water	Permanent	Inactive
NO 3 WELL	1522	Yes	Well	Ground water	Permanent	Inactive
NO 2 WELL	1521	Yes	Well	Ground water	Permanent	Inactive
NO 1 WELL	1520	Yes	Well	Ground water	Permanent	Inactive
NC VW 32	24603	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 31	24602	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 30	24601	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 29	24600	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 28	24599	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 27	24598	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 10B	22767	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 11A	22766	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 12A	22765	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 16A	22764	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 18A	22763	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 19A	22762	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 26	19248	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW25	19247	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW24	19246	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW23	19245	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW22	19244	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW21	19243	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW20	19242	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW19	19241	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW18	19240	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW 16	19239	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW15	19238	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW14	19237	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW13	19236	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW12	19235	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW11	19234	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW10	19233	Yes	Well	Ground water under the influence of surface water	Permanent	Active
NC VW10A	19232	Yes	Well	Ground water under the influence of surface water	Permanent	Active
LFH1	19254	Yes	Well	Ground water	Interim	Active
DA3 WELL	1519	Yes	Well	Ground water	Interim	Active
DA2 WELL	1518	Yes	Well	Ground water	Interim	Active
DA1 WELL	1517	Yes	Well	Ground water	Interim	Active
CC 3R	21740	Yes	Well	Ground water under the influence of surface water	Interim	Active
CC SA6R	19253	Yes	Well	Ground water under the influence of surface water	Interim	Active
CC 5R	19252	Yes	Well	Ground water under the influence of surface water	Interim	Active
CC 4R	19251	Yes	Well	Ground water under the influence of surface water	Interim	Active
CC 2R	19250	Yes	Well	Ground water under the influence of surface water	Interim	Active
CC 1R	19249	Yes	Well	Ground water under the influence of surface water	Interim	Active
AURORA RESERVIOR	25	Yes	Intake	Surface water	Permanent	Active
QUINCY RESERVIOR	24	Yes	Intake	Surface water	Permanent	Active
RAMPART SOUTH PLATTE RESERVIOR	23	Yes	Intake	Surface water	Permanent	Active

1 - 50 of 78

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
BWPP AURORA RESERVOIR TRAIN	17607	Permanganate	Manganese removal
BWPP AURORA RESERVOIR TRAIN	17607	Rapid Mix	Particulate removal
BWPP AURORA RESERVOIR TRAIN	17607	Coagulation	Particulate removal
BWPP AURORA RESERVOIR TRAIN	17607	Activated Carbon, Powdered	Taste / odor control
BWPP AURORA RESERVOIR TRAIN	17607	Flocculation	Particulate removal
BWPP AURORA RESERVOIR TRAIN	17607	Sedimentation	Particulate removal
BWPP AURORA RESERVOIR TRAIN	17607	Filtration, Rapid Sand	Particulate removal
BWPP AURORA RESERVOIR TRAIN	17607	Gaseous Chlorination, Post	Disinfection
BWPP AURORA RESERVOIR TRAIN	17607	Innovative	Disinfection
BWPP AURORA RESERVOIR TRAIN	17607	Chloramines	Disinfection by-products control
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Innovative	Taste / odor control
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Innovative	Manganese removal
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Rapid Mix	Particulate removal
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Flocculation	Particulate removal
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Sedimentation	Particulate removal
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Ultraviolet Radiation	Organics removal
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Filtration, Rapid Sand	Particulate removal
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Activated Carbon, Granular	Organics removal
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Innovative	Softening (hardness removal)
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Coagulation	Particulate removal
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Innovative	Other
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Peroxide	Organics removal
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Gaseous Chlorination, Post	Disinfection
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Innovative	Disinfection
BWPP SOUTH PLATTE ALLUVIAL TRAIN	19394	Chloramines	Disinfection by-products control
THOMAS J GRISWOLD WTP	3310	Coagulation	Particulate removal
THOMAS J GRISWOLD WTP	3310	Chlorine Dioxide	Disinfection
THOMAS J GRISWOLD WTP	3310	Gaseous Chlorination, Pre	Disinfection
THOMAS J GRISWOLD WTP	3310	Flocculation	Particulate removal
THOMAS J GRISWOLD WTP	3310	Filtration, Rapid Sand	Particulate removal
THOMAS J GRISWOLD WTP	3310	pH Adjustment	Corrosion control
THOMAS J GRISWOLD WTP	3310	Chloramines	Disinfection
THOMAS J GRISWOLD WTP	3310	Gaseous Chlorination, Post	Disinfection
THOMAS J GRISWOLD WTP	3310	Fluoridation	Other
WEMLINGER WTP	3311	Coagulation	Particulate removal
WEMLINGER WTP	3311	Gaseous Chlorination, Pre	Disinfection
WEMLINGER WTP	3311	Chlorine Dioxide	Disinfection
WEMLINGER WTP	3311	Flocculation	Particulate removal
WEMLINGER WTP	3311	Filtration, Rapid Sand	Particulate removal
WEMLINGER WTP	3311	Gaseous Chlorination, Post	Disinfection
WEMLINGER WTP	3311	Chloramines	Disinfection
WEMLINGER WTP	3311	Innovative	Particulate removal
WEMLINGER WTP	3311	Innovative	Iron removal
WEMLINGER WTP	3311	Innovative	Disinfection by-products control
WEMLINGER WTP	3311	Innovative	Inorganics removal
WEMLINGER WTP	3311	Rapid Mix	Disinfection by-products control
WEMLINGER WTP	3311	Innovative	Disinfection

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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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