Public water system · NM3580232
ActiveRio Del Oro Water System
At a glance
Rio Del Oro Water System (PWSID NM3580232) is an active community water system in Valencia County, New Mexico. It reports serving 4,387 people through 1,550 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,387
Service connections
1,550
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Rio Del Oro Water System compare with other water systems in Valencia County?
By EPA's size categories, Rio Del Oro Water System is a medium system (3,301 to 10,000 people). Valencia County has 28 active public water systems, and Rio Del Oro Water System is the 4th-largest of them by population served. Its population served is about 139% above the county average of 1,839 people per system, and accounts for 8.5% of the 51,498 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 Rio Del Oro Water System is about 35% 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,009 New Mexico systems (87%) list groundwater as their primary source.
Who owns and regulates Rio Del Oro Water System?
EPA lists Rio Del Oro Water System as privately owned. 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. 21 of the 28 active systems in Valencia County (75%) are also privately owned.
Does Rio Del Oro Water System have drinking water violations?
EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in January 2026. The violations listed here began between October 1999 and January 2026. By type: 6 public notice, recordkeeping or other, 2 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Consumer Confidence Rule (4 of them). EPA lists 8 as resolved and 1 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. 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 |
|---|---|---|---|---|
| 2026-01-10 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2018-11-10 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2017-04-01 | Public notice, recordkeeping or otherFailure to Notify Other PWS · code 73 | Groundwater Rulecode 0700 | No | Resolved |
| 2016-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2016-09-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Archived |
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1999-10-19 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1999-10-19 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
All 9 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.
Rio Del Oro Water System: frequently asked questions
Who runs Rio Del Oro Water System?
Rio Del Oro Water System (PWSID NM3580232) is a community water system privately owned. It is regulated by the NM state drinking water program.
How many people does Rio Del Oro Water System serve?
Rio Del Oro Water System reports serving 4,387 people through 1,550 service connections in Valencia County, New Mexico.
Where does Rio Del Oro 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 Rio Del Oro Water System have any drinking water violations?
EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in January 2026. 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 Rio Del Oro 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 9 violations for this system; 1 is health-based, and the most recent began in January 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the NM state drinking water program.
Where can I find Rio Del Oro Water System's water quality report?
As a community water system, Rio Del Oro 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 Valencia County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Los Lunas Water System | Valencia | 19,400 | Community | Groundwater |
| Belen Water System | Valencia | 10,830 | Community | Groundwater |
| Rio Communities Water System | Valencia | 5,513 | Community | Groundwater |
| Bosque Farms Water Supply System | Valencia | 4,367 | Community | Groundwater |
| Meadow Lake Water System | Valencia | 2,760 | Community | Groundwater |
| Monterey Water Company Inc.. | Valencia | 1,472 | 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, “Rio Del Oro Water System, PWSID NM3580232, New Mexico”, https://aquacensus.com/water-systems/new-mexico/rio-del-oro-water-system-nm3580232 (data as of October 1, 2026).