Public water system · WV9925020

Active

Westlake Chemical

At a glance

Westlake Chemical (PWSID WV9925020) is an active non-transient non-community water system in Marshall County, West Virginia. It reports serving 435 people through 275 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 April 2025.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

435

Service connections

275

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDWV9925020

System typeNon-transient non-community water system

Activity statusActive

Population served435

Service connections275

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyWV state drinking water program

City servedNew Martinsville

StateWest Virginia

ZIP—

CountyMarshall County

How does Westlake Chemical compare with other water systems in Marshall County?

By EPA's size categories, Westlake Chemical is a very small system (500 people or fewer). Marshall County has 14 active public water systems. Its population served is well below the county average of 2,182 people per system, and accounts for 1.4% of the 30,546 people reported by systems filed under the county. Across West Virginia, the 791 active systems average 2,032 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Westlake Chemical is roughly in line with that figure.

What does “non-transient non-community water system” mean?

A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. West Virginia has 55 active non-transient non-community water systems, 7% of the state's 791 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 468 West Virginia systems (59%) list groundwater as their primary source.

Who owns and regulates Westlake Chemical?

EPA lists Westlake Chemical as privately owned. The WV state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 4 of the 14 active systems in Marshall County (29%) are also privately owned.

Does Westlake Chemical have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2025. The violations listed here began between January 2017 and April 2025. By type: 7 monitoring and reporting, 4 public notice, recordkeeping or other and 1 monitoring. The contaminant or rule involved most often is Public Notice (4 of them). EPA lists 5 as resolved, 4 as unaddressed and 3 as archived. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. 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.

Began	Violation	Contaminant or rule	Health-based	Status
2025-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Archived
2021-04-14	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2021-04-14	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2021-04-14	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2021-04-14	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Unaddressed
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	Methoxychlorcode 2015	No	Archived
2019-10-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2019-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2018-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2018-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2017-01-01	Monitoring and reportingMonitoring, Regular · code 03	Simazinecode 2037	No	Archived
2017-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitritecode 1041	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.

Westlake Chemical: frequently asked questions

Who runs Westlake Chemical?

Westlake Chemical (PWSID WV9925020) is a non-transient non-community water system privately owned. It is regulated by the WV state drinking water program.

How many people does Westlake Chemical serve?

Westlake Chemical reports serving 435 people through 275 service connections in Marshall County, West Virginia.

Where does Westlake Chemical 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 Westlake Chemical 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 April 2025. 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 Westlake Chemical'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 April 2025. For current results, consult EPA ECHO, or the WV state drinking water program.

Where can I find Westlake Chemical's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Westlake Chemical is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

Other water systems in Marshall County

Water system	County	Population served	Type	Source
Moundsville	Marshall	9,911	Community	Groundwater
Marshall County Psd 4	Marshall	4,063	Community	Purchased groundwater
Marshall County Psd 1	Marshall	3,463	Community	Purchased groundwater
Marshall County Psd 3	Marshall	2,694	Community	Purchased groundwater
Glen Dale Water Works	Marshall	2,495	Community	Groundwater
Mcmechen Municipal Water	Marshall	2,212	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, “Westlake Chemical, PWSID WV9925020, West Virginia”, https://aquacensus.com/water-systems/west-virginia/westlake-chemical-wv9925020 (data as of October 1, 2026).