Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	CA4110010
PWS Name	MONTARA WATER AND SANITARY DISTRICT
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	6078
County Served	San Mateo

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
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	1017010	Returned to Compliance	01-JUN-2010	30-JUN-2010	Yes
MR	Monitoring, Check/Repeat/Confirmation	Nitrate Rule	Nitrate	9704008	Returned to Compliance	31-DEC-1996	01-DEC-1997	No
MCL	Maximum Contaminant Level Violation, Single Sample	Inorganic Chemicals	CYANIDE	9704007	Returned to Compliance	31-DEC-1996	01-DEC-1997	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	9604009	Returned to Compliance	01-FEB-1996	29-FEB-1996	Yes

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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
9917013	9704008	SOX	State Compliance achieved	27-FEB-2018	State	-
1117015	1017010	SOX	State Compliance achieved	16-JUL-2010	State	ENF_NO:02-17-09C-017;
717013	9704007	SOX	State Compliance achieved	22-DEC-1997	State	RTC: SAMPLING, PN DONE
9917012	9604009	SOX	State Compliance achieved	25-FEB-1996	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
ALTA VISTA WTP - RAW	31426	Yes	Intake	Surface water	Permanent	Active
CULEBRA WELL	58891	Yes	Well	Ground water	Permanent	Active
RETIRO WELL	58890	Yes	Well	Ground water	Permanent	Active
CORONA WELL	58889	Yes	Well	Ground water	Permanent	Active
ALTA VISTA WELL 01	23877	Yes	Well	Ground water	Permanent	Active
PORTOLA WELL 01	15584	Yes	Well	Ground water	Permanent	Active
PORTOLA WELL 04	15582	Yes	Well	Ground water	Permanent	Active
NORTH AIRPORT WELL 02	10209	Yes	Well	Ground water	Permanent	Active
WAGNER WELL 03	10208	Yes	Well	Ground water	Permanent	Active
PORTOLA WELL 03	10205	Yes	Well	Ground water	Permanent	Active
DRAKE WELL	10201	Yes	Well	Ground water	Permanent	Active
AIRPORT WELL 03	10200	Yes	Well	Ground water	Permanent	Active
WAGNER WELL 02 - INACTIVE	20536	Yes	Well	Ground water	Other	Inactive
PARK WELL - INACTIVE	20519	Yes	Well	Ground water	Other	Inactive
PORTOLA WELL 02 - INACTIVE	20518	Yes	Well	Ground water	Other	Inactive
OAK STREET WELL - INACTIVE	20226	Yes	Well	Ground water	Other	Inactive
S AIRPORT WELL - STANDBY	10198	Yes	Well	Ground water	Emergency	Active
MONTARA CREEK - RAW	31429	Yes	Intake	Surface water	Permanent	Active
PRMHP RAW WATER (PRE-AERATION TOWER)	58892	No	Common Headers	-	-	Active
ALTA VISTA WTP - RAW	74579	No	Common Headers	-	-	Active
DRAKE/WAGNER - RAW - INACTIVE	31428	No	Common Headers	-	-	Inactive
DISTRIBUTION SYSTEM	31427	No	Distribution System/Zone	-	-	Active
NAW02 BLENDED IX EFFLUENT	31431	No	Other	-	-	Active
N AIRPORT WELL - MONITORING WELL	31430	No	Sampling Station	-	-	Active
131 CODO WELL - MONITORING WELL	74692	No	Sampling Station	-	-	Active
PORTOLA WELL 03 - CHLORINATED	3584	No	Treatment Plant	-	-	Active
AIRPORT WELL 03 - CHLORINATED	3585	No	Treatment Plant	-	-	Active
NORTH AIRPORT WELL 02 - CHLORINATED	3587	No	Treatment Plant	-	-	Active
DRAKE & WAGNER WELL 03 - CL2	3588	No	Treatment Plant	-	-	Active
N ARPT WELL02-LEAD IX EFFLUENT	3589	No	Treatment Plant	-	-	Active
N ARPT WELL02-LAG IX EFFLUENT	3590	No	Treatment Plant	-	-	Active
ALTA VISTA WTP - TREATED	3591	No	Treatment Plant	-	-	Active
PORTOLA WELL 01 - CHLORINATED	3604	No	Treatment Plant	-	-	Active
ALTA VISTA WELL 01 - CHLORINATED	55112	No	Treatment Plant	-	-	Active
PRMHP HYDRO TANK (BOOSTER PUMP)	58893	No	Treatment Plant	-	-	Active
PRMHP POST AERATION/PRE FILTER	58894	No	Treatment Plant	-	-	Active
PRMHP TREATED WATER (POST FILTRATION)	58895	No	Treatment Plant	-	-	Active
AIRPORT WELL 03 - LEAD IX EFFLUENT	74630	No	Treatment Plant	-	-	Active
AIRPORT WELL 03 - LAG IX EFFLUENT	74632	No	Treatment Plant	-	-	Active
AIRPORT WELL 03 BLENDED IX EFFLUENT	74634	No	Treatment Plant	-	-	Active
S AIRPORT WELL - CHLORINATED	3586	No	Treatment Plant	-	-	Inactive
N. AIRPORT WELL 02 - TREATED - INACTIVE	3593	No	Treatment Plant	-	-	Inactive
AIRPORT WELLS TREATMENT PLANT - INACTIVE	5891	No	Treatment Plant	-	-	Inactive
DRAKE/WAGNER GAC LEAD MID - INACTIVE	5898	No	Treatment Plant	-	-	Inactive
DRAKE/WAGNER GAC EFFLUENT - INACTIVE	5905	No	Treatment Plant	-	-	Inactive
DRAKE/WAGNER GAC MIDPOINT - INACTIVE	5913	No	Treatment Plant	-	-	Inactive
NORTH AIRPORT HANGER - TREATED-INACTIVE	5947	No	Treatment Plant	-	-	Inactive
AIRPORT WELL 03 - TREATED - INACTIVE	7131	No	Treatment Plant	-	-	Inactive
S. AIRPORT WELL - TREATED - INACTIVE	7132	No	Treatment Plant	-	-	Inactive
PARK WELL - TREATED - INACTIVE	7257	No	Treatment Plant	-	-	Inactive

1 - 50 of 50

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
PORTOLA WELL 03 - CHLORINATED	3584	Hypochlorination, Post	Disinfection
AIRPORT WELL 03 - CHLORINATED	3585	Hypochlorination, Post	Disinfection
S AIRPORT WELL - CHLORINATED	3586	Hypochlorination, Post	Disinfection
NORTH AIRPORT WELL 02 - CHLORINATED	3587	Hypochlorination, Post	Disinfection
DRAKE & WAGNER WELL 03 - CL2	3588	Hypochlorination, Post	Disinfection
N ARPT WELL02-LEAD IX EFFLUENT	3589	Ion Exchange	Inorganics removal
N ARPT WELL02-LAG IX EFFLUENT	3590	Ion Exchange	Inorganics removal
ALTA VISTA WTP - TREATED	3591	Hypochlorination, Pre	Disinfection
ALTA VISTA WTP - TREATED	3591	Filtered	Particulate removal
N. AIRPORT WELL 02 - TREATED - INACTIVE	3593	pH Adjustment, Post	Corrosion control
N. AIRPORT WELL 02 - TREATED - INACTIVE	3593	Rapid Mix	Inorganics removal
N. AIRPORT WELL 02 - TREATED - INACTIVE	3593	Ion Exchange	Inorganics removal
PORTOLA WELL 01 - CHLORINATED	3604	Hypochlorination, Post	Disinfection
ALTA VISTA WELL 01 - CHLORINATED	55112	Hypochlorination, Post	Disinfection
PRMHP HYDRO TANK (BOOSTER PUMP)	58893	Aeration, Packed Tower	Organics removal
PRMHP POST AERATION/PRE FILTER	58894	Aeration, Packed Tower	Organics removal
PRMHP TREATED WATER (POST FILTRATION)	58895	Permanganate	Iron removal
AIRPORT WELLS TREATMENT PLANT - INACTIVE	5891	Rapid Mix	Inorganics removal
AIRPORT WELLS TREATMENT PLANT - INACTIVE	5891	pH Adjustment, Post	Corrosion control
AIRPORT WELLS TREATMENT PLANT - INACTIVE	5891	Hypochlorination, Post	Disinfection
DRAKE/WAGNER GAC LEAD MID - INACTIVE	5898	Activated Carbon, Granular	Organics removal
DRAKE/WAGNER GAC EFFLUENT - INACTIVE	5905	Activated Carbon, Granular	Organics removal
DRAKE/WAGNER GAC MIDPOINT - INACTIVE	5913	Activated Carbon, Granular	Organics removal
NORTH AIRPORT HANGER - TREATED-INACTIVE	5947	Rapid Mix	Inorganics removal
PARK WELL - TREATED - INACTIVE	7257	Hypochlorination, Post	Disinfection
AIRPORT WELL 03 - LEAD IX EFFLUENT	74630	Ion Exchange	Inorganics removal
AIRPORT WELL 03 - LAG IX EFFLUENT	74632	Ion Exchange	Inorganics removal
AIRPORT WELL 03 BLENDED IX EFFLUENT	74634	Ion Exchange	Inorganics removal

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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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