Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CT1350011
PWS Name	AQUARION-STAMFORD
PWS Type	Community water system
Owner Type	Private
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	119214
County Served	Fairfield

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	Lead Consumer Notice	Lead and Copper Rule	Lead and Copper Rule	8720357	Returned to Compliance	30-DEC-2021	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	8720313	Returned to Compliance	01-JUL-2018	-	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	8720334	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	8720354	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	8720353	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	8720333	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	8720332	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	8720336	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	8720328	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	8720326	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	8720325	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	8720324	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb	8720323	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	8720322	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfone	8720320	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfoxide	8720319	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	8720352	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	8720351	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	8720350	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	8720349	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	8720348	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	8720347	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	8720346	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	8720345	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	8720344	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	8720343	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	8720316	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	8720315	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	8720314	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	8720342	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	8720341	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	1,2-DIBROMO-3-CHLOROPROPANE	8720339	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	8720340	Returned to Compliance	01-JAN-2016	31-DEC-2018	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	8719006	Returned to Compliance	01-JUL-2006	-	No

1 - 34 of 34

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
720	8720357	SOX	State Compliance achieved	21-JAN-2022	State	lead consumer notice received
718	8720336	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720354	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720314	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720315	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720316	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720319	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720320	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720322	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720323	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720324	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720325	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720326	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720328	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720332	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720333	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720334	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720339	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720340	SIF	State Public Notification received	28-FEB-2020	State	-
718	8720341	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720342	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720343	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720344	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720345	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720346	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720347	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720348	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720349	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720350	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720351	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720352	SIF	State Public Notification received	28-FEB-2020	State	-
717	8720353	SIF	State Public Notification received	28-FEB-2020	State	-
710	8720313	SIA	State Violation/Reminder Notice	16-JAN-2019	State	-
707	8719006	SIA	State Violation/Reminder Notice	13-OCT-2006	State	-

1 - 34 of 34

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
INTERCONNECTION - CT0150011 - HOYT	48561	Yes	Consecutive Connection	Surface water	Permanent	Active
WIRE MILL WELL	27870	Yes	Well	Ground water	Seasonal	Active
NORTH STAMFORD RESERVOIR	32671	Yes	Reservoir	Surface water	Permanent	Active
LAUREL RESERVOIR	32670	Yes	Reservoir	Surface water	Permanent	Active
SISCOWIT RESERVOIR	32669	Yes	Reservoir	Surface water	Permanent	Active
TRINITY LAKE	32668	Yes	Reservoir	Surface water	Permanent	Active
MILL RIVER RESERVOIR	32667	Yes	Reservoir	Surface water	Permanent	Active
LAUREL RESERVOIR INTAKE	23867	Yes	Intake	Surface water	Permanent	Active
NORTH STAMFORD RESERVOIR	23866	Yes	Intake	Surface water	Permanent	Active
INTERCONNECTION - CT0150011 - WESTPORT	61408	Yes	Consecutive Connection	Surface water	Permanent	Active
INTERCONNECTION -CT0570011 - HAVEMAYER	61585	Yes	Consecutive Connection	Surface water	Permanent	Active
DISTRIBUTION SYSTEM	23868	No	Distribution System/Zone	-	-	Active
NORTH POORHOUSE BROOK DIVERSION	32672	No	Other	-	-	Active
SOUTH POORHOUSE BROOK DIVERSION	32726	No	Other	-	-	Inactive
LAUREL PUMP STATION	54301	No	Pump Facility	-	-	Active
NORTH STAMFORD RAW WATER PUMP STATION	54305	No	Pump Facility	-	-	Active
NORTH STAMFORD PUMP STATION	54307	No	Pump Facility	-	-	Active
VINE ROAD PUMP STATION	54309	No	Pump Facility	-	-	Active
BLACHLEY BOOSTER STATION	54315	No	Pump Facility	-	-	Active
HIGHCLIFF PUMP STATION	54319	No	Pump Facility	-	-	Active
ILIFF PUMP STATION	59382	No	Pump Facility	-	-	Active
STAMFORD WTP ENTRY POINT	38020	No	Sampling Station	-	-	Active
BACKWASH RECYCLE SAMPLE TAP	46272	No	Sampling Station	-	-	Active
STAMFORD WTP RAW INFLUENT	48164	No	Sampling Station	-	-	Active
LAUREL HIGH SERVICE ENTRY POINT	46264	No	Sampling Station	-	-	Inactive
WIRE MILL WELL TP ENTRY POINT	46265	No	Sampling Station	-	-	Inactive
LAUREL HIGH SERVICE TANK	54074	No	Storage	-	-	Active
STAMFORD WTP CLEARWELL - NORTH	54297	No	Storage	-	-	Active
STAMFORD WTP CLEARWELL - SOUTH	54299	No	Storage	-	-	Active
OLD STAMFORD WTP CLEARWELL	54303	No	Storage	-	-	Active
WEED HILL STORAGE TANK	54311	No	Storage	-	-	Active
BLACHLEY STORAGE TANK	54313	No	Storage	-	-	Active
ROXBURY STORAGE TANK	54317	No	Storage	-	-	Active
WIRE MILL WELL TREATMENT PLANT	46267	No	Treatment Plant	-	-	Active
STAMFORD WATER TREATMENT PLANT	53450	No	Treatment Plant	-	-	Active
OLD STAMFORD WATER TREATMENT PLANT	36546	No	Treatment Plant	-	-	Inactive

1 - 36 of 36

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
OLD STAMFORD WATER TREATMENT PLANT	36546	Coagulation	Particulate removal
OLD STAMFORD WATER TREATMENT PLANT	36546	Filtration, Rapid Sand	Particulate removal
OLD STAMFORD WATER TREATMENT PLANT	36546	Flocculation	Particulate removal
OLD STAMFORD WATER TREATMENT PLANT	36546	pH Adjustment, Pre	Particulate removal
OLD STAMFORD WATER TREATMENT PLANT	36546	Rapid Mix	Particulate removal
OLD STAMFORD WATER TREATMENT PLANT	36546	Sedimentation	Particulate removal
OLD STAMFORD WATER TREATMENT PLANT	36546	Inhibitor, Polyphosphate	Corrosion control
OLD STAMFORD WATER TREATMENT PLANT	36546	pH Adjustment, Post	Corrosion control
OLD STAMFORD WATER TREATMENT PLANT	36546	Fluoridation	Other
OLD STAMFORD WATER TREATMENT PLANT	36546	Hypochlorination, Post	Disinfection
OLD STAMFORD WATER TREATMENT PLANT	36546	Hypochlorination, Pre	Disinfection
WIRE MILL WELL TREATMENT PLANT	46267	Hypochlorination, Post	Disinfection
WIRE MILL WELL TREATMENT PLANT	46267	pH Adjustment	Corrosion control
STAMFORD WATER TREATMENT PLANT	53450	Filtration, Rapid Sand	Particulate removal
STAMFORD WATER TREATMENT PLANT	53450	Fluoridation	Other
STAMFORD WATER TREATMENT PLANT	53450	Inhibitor, Polyphosphate	Corrosion control
STAMFORD WATER TREATMENT PLANT	53450	Hypochlorination, Post	Disinfection
STAMFORD WATER TREATMENT PLANT	53450	pH Adjustment, Post	Corrosion control
STAMFORD WATER TREATMENT PLANT	53450	Flocculation	Particulate removal
STAMFORD WATER TREATMENT PLANT	53450	Coagulation	Particulate removal
STAMFORD WATER TREATMENT PLANT	53450	pH Adjustment, Pre	Particulate removal
STAMFORD WATER TREATMENT PLANT	53450	Flocculation	Particulate removal
STAMFORD WATER TREATMENT PLANT	53450	Coagulation	Particulate removal
STAMFORD WATER TREATMENT PLANT	53450	Rapid Mix	Particulate removal
STAMFORD WATER TREATMENT PLANT	53450	Aeration, Diffused	Particulate removal
STAMFORD WATER TREATMENT PLANT	53450	Hypochlorination, Pre	Disinfection
STAMFORD WATER TREATMENT PLANT	53450	pH Adjustment	Corrosion control
STAMFORD WATER TREATMENT PLANT	53450	Inhibitor, Orthophosphate	Corrosion control

1 - 28 of 28

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