Public water system · NM3527920
ActiveSan Jon Water Supply
At a glance
San Jon Water Supply (PWSID NM3527920) is an active community water system in Quay County, New Mexico. It reports serving 360 people through 158 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in April 2005.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
360
Service connections
158
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does San Jon Water Supply compare with other water systems in Quay County?
By EPA's size categories, San Jon Water Supply is a very small system (500 people or fewer). Quay County has 10 active public water systems, and San Jon Water Supply is the 5th-largest of them by population served. Its population served is about 66% below the county average of 1,065 people per system, and accounts for 3.4% of the 10,646 people reported by systems filed under the county. Across New Mexico, the 1,165 active systems average 1,885 people each. Nationally, the average active community water system reports serving 6,703 people, so San Jon Water Supply 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. New Mexico has 645 active community water systems, 55% of the state's 1,165 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 62 New Mexico systems (5.3%) list purchased groundwater as their primary source.
Who owns and regulates San Jon Water Supply?
EPA lists San Jon Water Supply as owned by a local government. The NM state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 6 of the 10 active systems in Quay County (60%) are also owned by a local government.
Does San Jon Water Supply have drinking water violations?
Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in April 2005. The violations listed here began between April 2002 and April 2005. By type: 9 contaminant level above the legal limit, 2 public notice, recordkeeping or other and 1 monitoring and reporting. The contaminant or rule involved most often is Fluoride (9 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 |
|---|---|---|---|---|
| 2005-04-29 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2004-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Resolved |
| 2004-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Resolved |
| 2003-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Resolved |
| 2003-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Resolved |
| 2003-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2003-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Resolved |
| 2003-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Resolved |
| 2002-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Resolved |
| 2002-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Resolved |
| 2002-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | 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.
San Jon Water Supply: frequently asked questions
Who runs San Jon Water Supply?
San Jon Water Supply (PWSID NM3527920) is a community water system owned by a local government. It is regulated by the NM state drinking water program.
How many people does San Jon Water Supply serve?
San Jon Water Supply reports serving 360 people through 158 service connections in Quay County, New Mexico.
Where does San Jon Water Supply get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does San Jon Water Supply have any drinking water violations?
Of the 12 most recent violations in EPA's records, 9 are health-based, and the most recent began in April 2005. 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 San Jon Water Supply'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, 9 are health-based, and the most recent began in April 2005. For current results, consult the system's annual water quality report, EPA ECHO, or the NM state drinking water program.
Where can I find San Jon Water Supply's water quality report?
As a community water system, San Jon Water Supply 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 Quay County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tucumcari Water System | Quay | 6,064 | Community | Groundwater |
| Logan Water System | Quay | 2,321 | Community | Groundwater |
| Rad Water Users Coop | Quay | 641 | Community | Purchased groundwater |
| Russells Endee Truck and Travel Ctr 2 | Quay | 475 | Non-transient non-community | Groundwater |
| Liberty Mdwca | Quay | 266 | Community | Purchased groundwater |
| Glenrio Highway Rest Area | Quay | 250 | Transient non-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, “San Jon Water Supply, PWSID NM3527920, New Mexico”, https://aquacensus.com/water-systems/new-mexico/san-jon-water-supply-nm3527920 (data as of October 1, 2026).