Public water system · WA5368750
ActivePort Madison Water Company
At a glance
Port Madison Water Company (PWSID WA5368750) is an active community water system in Kitsap County, Washington. It reports serving 233 people through 103 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2008.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
233
Service connections
103
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Port Madison Water Company compare with other water systems in Kitsap County?
By EPA's size categories, Port Madison Water Company is a very small system (500 people or fewer). Kitsap County has 220 active public water systems. Its population served is well below the county average of 1,560 people per system, and accounts for less than 0.1% of the 343,203 people reported by systems filed under the county. Across Washington, the 4,705 active systems average 2,172 people each. Nationally, the average active community water system reports serving 6,703 people, so Port Madison Water Company is well below 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. Washington has 2,392 active community water systems, 51% of the state's 4,705 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 4,370 Washington systems (93%) list groundwater as their primary source.
Who owns and regulates Port Madison Water Company?
EPA lists Port Madison Water Company as privately owned. The WA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 164 of the 220 active systems in Kitsap County (75%) are also privately owned.
Does Port Madison Water Company 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 2008. The violations listed here began between January 2008 and January 2008. By type: 12 monitoring and reporting. The contaminants or rules involved are Fluoride, Cyanide, Selenium and Thallium. 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 |
|---|---|---|---|---|
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cyanidecode 1024 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Thalliumcode 1085 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nickelcode 1036 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Antimonycode 1074 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Berylliumcode 1075 | 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.
Port Madison Water Company: frequently asked questions
Who runs Port Madison Water Company?
Port Madison Water Company (PWSID WA5368750) is a community water system privately owned. It is regulated by the WA state drinking water program.
How many people does Port Madison Water Company serve?
Port Madison Water Company reports serving 233 people through 103 service connections in Kitsap County, Washington.
Where does Port Madison Water Company 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 Port Madison Water Company 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 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 Port Madison Water Company'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 2008. For current results, consult the system's annual water quality report, EPA ECHO, or the WA state drinking water program.
Where can I find Port Madison Water Company's water quality report?
As a community water system, Port Madison Water Company 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 Kitsap County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Bremerton City of | Kitsap | 72,951 | Community | Surface water |
| Silverdale Water Dist 16 | Kitsap | 35,163 | Community | Groundwater |
| West Sound Utility District #1 | Kitsap | 28,930 | Community | Groundwater |
| North Perry Ave Water District | Kitsap | 24,402 | Community | Groundwater |
| Poulsbo City of | Kitsap | 18,400 | Community | Groundwater |
| Naval Base Kitsap at Bangor | Kitsap | 16,828 | 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, “Port Madison Water Company, PWSID WA5368750, Washington”, https://aquacensus.com/water-systems/washington/port-madison-water-company-wa5368750 (data as of October 1, 2026).