Public water system · MA4261024
ActiveUpper Cape Regional Water Cooperative
At a glance
Upper Cape Regional Water Cooperative (PWSID MA4261024) is an active community water system in Barnstable County, Massachusetts. It reports serving 56,250 people through 6 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in June 2008.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
56,250
Service connections
6
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Upper Cape Regional Water Cooperative compare with other water systems in Barnstable County?
By EPA's size categories, Upper Cape Regional Water Cooperative is a large system (10,001 to 100,000 people). Barnstable County has 125 active public water systems, and Upper Cape Regional Water Cooperative is the 3rd-largest of them by population served. Its population served is about 11 times the county average of 5,016 people per system, and accounts for 9% of the 627,054 people reported by systems filed under the county. Across Massachusetts, the 1,636 active systems average 6,275 people each. Nationally, the average active community water system reports serving 6,703 people, so Upper Cape Regional Water Cooperative is about 8.4 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. Massachusetts has 531 active community water systems, 32% of the state's 1,636 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,354 Massachusetts systems (83%) list groundwater as their primary source.
Who owns and regulates Upper Cape Regional Water Cooperative?
EPA lists Upper Cape Regional Water Cooperative as owned by a local government. The MA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 31 of the 125 active systems in Barnstable County (25%) are also owned by a local government.
Does Upper Cape Regional Water Cooperative have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in June 2008. The violations listed here began between October 2002 and June 2008. By type: 11 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Total coliform bacteria (TCR), Tetrachloroethylene, Toluene and Xylenes, Total. EPA lists 11 as archived and 1 as resolved. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. 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 |
|---|---|---|---|---|
| 2008-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Archived |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Archived |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Archived |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Archived |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Archived |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Archived |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Archived |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Archived |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Archived |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Archived |
| 2002-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Archived |
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.
Upper Cape Regional Water Cooperative: frequently asked questions
Who runs Upper Cape Regional Water Cooperative?
Upper Cape Regional Water Cooperative (PWSID MA4261024) is a community water system owned by a local government. It is regulated by the MA state drinking water program.
How many people does Upper Cape Regional Water Cooperative serve?
Upper Cape Regional Water Cooperative reports serving 56,250 people through 6 service connections in Barnstable County, Massachusetts.
Where does Upper Cape Regional Water Cooperative get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Upper Cape Regional Water Cooperative have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in June 2008. 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 Upper Cape Regional Water Cooperative'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, one is health-based, and the most recent began in June 2008. For current results, consult the system's annual water quality report, EPA ECHO, or the MA state drinking water program.
Where can I find Upper Cape Regional Water Cooperative's water quality report?
As a community water system, Upper Cape Regional Water Cooperative 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 Barnstable County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Falmouth Water Dept | Barnstable | 97,551 | Community | Surface water |
| Dennis Water District | Barnstable | 65,000 | Community | Groundwater |
| Centerville Osterville Marstons Mills Wd | Barnstable | 50,000 | Community | Groundwater |
| Harwich Water Department | Barnstable | 39,144 | Community | Groundwater |
| Yarmouth Water Department | Barnstable | 38,900 | Community | Groundwater |
| Mashpee Water District | Barnstable | 36,922 | Community | Groundwater |
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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, “Upper Cape Regional Water Cooperative, PWSID MA4261024, Massachusetts”, https://aquacensus.com/water-systems/massachusetts/upper-cape-regional-water-cooperative-ma4261024 (data as of October 1, 2026).