Public water system · NJ0233001
ActiveMahwah Water Department
At a glance
Mahwah Water Department (PWSID NJ0233001) is an active community water system in Bergen County, New Jersey. It reports serving 26,777 people through 8,775 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
26,777
Service connections
8,775
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Mahwah Water Department compare with other water systems in Bergen County?
By EPA's size categories, Mahwah Water Department is a large system (10,001 to 100,000 people). Bergen County has 51 active public water systems, and Mahwah Water Department is the 5th-largest of them by population served. Its population served is about 18% above the county average of 22,621 people per system, and accounts for 2.3% of the 1,153,643 people reported by systems filed under the county. Across New Jersey, the 3,496 active systems average 2,750 people each. Nationally, the average active community water system reports serving 6,703 people, so Mahwah Water Department is about 4 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. New Jersey has 582 active community water systems, 17% of the state's 3,496 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 29 New Jersey systems (0.8%) list surface water as their primary source.
Who owns and regulates Mahwah Water Department?
EPA lists Mahwah Water Department as owned by a local government. The NJ state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 22 of the 51 active systems in Bergen County (43%) are also owned by a local government.
Does Mahwah Water Department have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2023. The violations listed here began between January 2023 and January 2023. By type: 12 monitoring and reporting. The contaminants or rules involved are Vinyl chloride, Carbon tetrachloride, Benzene and Tetrachloroethylene. EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
The 12 most recent violations in EPA's records, newest first. Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Mahwah Water Department: frequently asked questions
Who runs Mahwah Water Department?
Mahwah Water Department (PWSID NJ0233001) is a community water system owned by a local government. It is regulated by the NJ state drinking water program.
How many people does Mahwah Water Department serve?
Mahwah Water Department reports serving 26,777 people through 8,775 service connections in Bergen County, New Jersey.
Where does Mahwah Water Department get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Mahwah Water Department have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2023. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Mahwah Water Department's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the NJ state drinking water program.
Where can I find Mahwah Water Department's water quality report?
As a community water system, Mahwah Water Department must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Bergen County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Veolia Water New Jersey Hackensack | Bergen + 1 more | 792,713 | Community | Surface water |
| Ridgewood Water | Bergen | 61,700 | Community | Purchased surface water |
| Fair Lawn Water Dept | Bergen | 35,564 | Community | Purchased surface water |
| Garfield Water Department | Bergen | 30,487 | Community | Purchased surface water |
| Passaic Valley Wc Lodi Wd | Bergen | 24,136 | Community | Purchased surface water |
| Lyndhurst Water Department | Bergen | 20,500 | Community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Mahwah Water Department, PWSID NJ0233001, New Jersey”, https://aquacensus.com/water-systems/new-jersey/mahwah-water-department-nj0233001 (data as of October 1, 2026).