Public water system · TX1700643

Active

Grand Harbor Water System

At a glance

Grand Harbor Water System (PWSID TX1700643) is an active community water system in Montgomery County, Texas. It reports serving 2,370 people through 790 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 10 violations for this system; none is health-based, and the most recent began in December 2018.

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

Population served

2,370

Service connections

790

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDTX1700643

System typeCommunity water system

Activity statusActive

Population served2,370

Service connections790

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyTX state drinking water program

City served—

StateTexas

ZIP—

CountyMontgomery County

How does Grand Harbor Water System compare with other water systems in Montgomery County?

By EPA's size categories, Grand Harbor Water System is a small system (501 to 3,300 people). Montgomery County has 438 active public water systems. Its population served is about 33% above the county average of 1,784 people per system, and accounts for 0.3% of the 781,236 people reported by systems filed under the county. Across Texas, the 7,078 active systems average 4,789 people each. Nationally, the average active community water system reports serving 6,703 people, so Grand Harbor Water System is about 65% 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. Texas has 4,594 active community water systems, 65% of the state's 7,078 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 5,215 Texas systems (74%) list groundwater as their primary source.

Who owns and regulates Grand Harbor Water System?

EPA lists Grand Harbor Water System as privately owned. The TX state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 281 of the 438 active systems in Montgomery County (64%) are also privately owned.

Does Grand Harbor Water System have drinking water violations?

EPA's records list 10 violations for this system; none is health-based, and the most recent began in December 2018. The violations listed here began between July 2003 and December 2018. By type: 6 monitoring and reporting and 4 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 10 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
2018-12-30	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2017-02-03	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2016-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2016-07-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2015-12-30	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2011-10-11	Monitoring and reportingMonitoring, Source Water (GWR) · code 34	E. colicode 3014	No	Resolved
2008-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2008-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2007-01-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2003-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved

All 10 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.

Grand Harbor Water System: frequently asked questions

Who runs Grand Harbor Water System?

Grand Harbor Water System (PWSID TX1700643) is a community water system privately owned. It is regulated by the TX state drinking water program.

How many people does Grand Harbor Water System serve?

Grand Harbor Water System reports serving 2,370 people through 790 service connections in Montgomery County, Texas.

Where does Grand Harbor Water System 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 Grand Harbor Water System have any drinking water violations?

EPA's records list 10 violations for this system; none is health-based, and the most recent began in December 2018. 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 Grand Harbor Water System'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. EPA's records list 10 violations for this system; none is health-based, and the most recent began in December 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.

Where can I find Grand Harbor Water System's water quality report?

As a community water system, Grand Harbor Water System 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 Montgomery County

Water system	County	Population served	Type	Source
City of Conroe	Montgomery	113,912	Community	Purchased surface water
Porter Special Utility District	Montgomery	26,388	Community	Groundwater
Montgomery Trace Water System	Montgomery	25,917	Community	Purchased surface water
Montgomery County MUD 46	Montgomery	24,399	Community	Purchased surface water
Montgomery County MUD 47	Montgomery	24,171	Community	Purchased surface water
Montgomery County MUD 67	Montgomery	16,821	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, “Grand Harbor Water System, PWSID TX1700643, Texas”, https://aquacensus.com/water-systems/texas/grand-harbor-water-system-tx1700643 (data as of October 1, 2026).