Public water system · NC0136020
ActiveMount Holly, City of
At a glance
City of Mount Holly (PWSID NC0136020) is an active community water system in Gaston County, North Carolina. It reports serving 19,200 people through 8,445 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 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
19,200
Service connections
8,445
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does City of Mount Holly compare with other water systems in Gaston County?
By EPA's size categories, City of Mount Holly is a large system (10,001 to 100,000 people). Gaston County has 247 active public water systems, and City of Mount Holly is the 2nd-largest of them by population served. Its population served is about 24 times the county average of 814 people per system, and accounts for 9.5% of the 201,158 people reported by systems filed under the county. Across North Carolina, the 5,087 active systems average 1,971 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Mount Holly is about 186% above 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. North Carolina has 2,031 active community water systems, 40% of the state's 5,087 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 132 North Carolina systems (2.6%) list surface water as their primary source.
Who owns and regulates City of Mount Holly?
EPA lists City of Mount Holly as owned by a local government. The NC state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 19 of the 247 active systems in Gaston County (7.7%) are also owned by a local government.
Does City of Mount Holly 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 2025. The violations listed here began between January 1989 and January 2025. By type: 9 monitoring and reporting, 2 public notice, recordkeeping or other and 1 monitoring. The contaminant or rule involved most often is Public Notice (2 of them). 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 |
|---|---|---|---|---|
| 2025-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2022-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2020-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2020-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2009-10-29 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2009-07-26 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dalaponcode 2031 | No | Resolved |
| 2008-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dalaponcode 2031 | No | Resolved |
| 1993-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1989-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4-Dcode 2105 | No | Resolved |
| 1989-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4,5-TP (Silvex)code 2110 | 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.
City of Mount Holly: frequently asked questions
Who runs City of Mount Holly?
City of Mount Holly (PWSID NC0136020) is a community water system owned by a local government. It is regulated by the NC state drinking water program.
How many people does City of Mount Holly serve?
City of Mount Holly reports serving 19,200 people through 8,445 service connections in Gaston County, North Carolina.
Where does City of Mount Holly 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 City of Mount Holly 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 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 City of Mount Holly'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 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the NC state drinking water program.
Where can I find City of Mount Holly's water quality report?
As a community water system, City of Mount Holly 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 Gaston County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Two Rivers Utilities | Gaston | 96,714 | Community | Surface water |
| Belmont, City of | Gaston | 17,477 | Community | Surface water |
| Dallas, Town of | Gaston | 8,212 | Community | Surface water |
| Cherryville, City of | Gaston | 6,353 | Community | Surface water |
| Bessemer City, City of | Gaston | 5,730 | Community | Surface water |
| Stanley, Town of | Gaston | 5,453 | 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, “Mount Holly, City of, PWSID NC0136020, North Carolina”, https://aquacensus.com/water-systems/north-carolina/mount-holly-city-of-nc0136020 (data as of October 1, 2026).