Public water system · NV0000191
ActiveRio Vista Nv LLC
At a glance
Rio Vista Nv LLC (PWSID NV0000191) is an active community water system in Washoe County, Nevada. It reports serving 65 people through 62 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, one is health-based, and the most recent began in January 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
65
Service connections
62
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Rio Vista Nv LLC compare with other water systems in Washoe County?
By EPA's size categories, Rio Vista Nv LLC is a very small system (500 people or fewer). Washoe County has 64 active public water systems. Its population served is well below the county average of 7,708 people per system, and accounts for less than 0.1% of the 493,331 people reported by systems filed under the county. Across Nevada, the 643 active systems average 5,508 people each. Nationally, the average active community water system reports serving 6,703 people, so Rio Vista Nv LLC 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. Nevada has 224 active community water systems, 35% of the state's 643 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 557 Nevada systems (87%) list groundwater as their primary source.
Who owns and regulates Rio Vista Nv LLC?
EPA lists Rio Vista Nv LLC as privately owned. The NV state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 43 of the 64 active systems in Washoe County (67%) are also privately owned.
Does Rio Vista Nv LLC have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2020. The violations listed here began between January 2010 and January 2020. By type: 10 monitoring and reporting, 1 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Chlorine (5 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 |
|---|---|---|---|---|
| 2020-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2015-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2015-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2010-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2010-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2010-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2010-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | 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.
Rio Vista Nv LLC: frequently asked questions
Who runs Rio Vista Nv LLC?
Rio Vista Nv LLC (PWSID NV0000191) is a community water system privately owned. It is regulated by the NV state drinking water program.
How many people does Rio Vista Nv LLC serve?
Rio Vista Nv LLC reports serving 65 people through 62 service connections in Washoe County, Nevada.
Where does Rio Vista Nv LLC 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 Vista Nv LLC have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2020. 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 Vista Nv LLC'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, one is health-based, and the most recent began in January 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the NV state drinking water program.
Where can I find Rio Vista Nv LLC's water quality report?
As a community water system, Rio Vista Nv LLC 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 Washoe County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Truckee Meadows Water Authority | Washoe | 442,000 | Community | Surface water |
| Sun Valley Gid | Washoe | 17,000 | Community | Purchased surface water |
| Great Basin Water Co Cold Springs | Washoe | 9,910 | Community | Groundwater |
| Incline Village Gid | Washoe | 9,313 | Community | Surface water |
| Great Basin Water Co Spanish Springs | Washoe | 1,450 | Community | Groundwater |
| Truckee Canyon | Washoe | 1,016 | Non-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, “Rio Vista Nv LLC, PWSID NV0000191, Nevada”, https://aquacensus.com/water-systems/nevada/rio-vista-nv-llc-nv0000191 (data as of October 1, 2026).