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Community Water System · PWS NV0000191

Rio Vista NV LLC

Verdi, Nevada 89439-0784 - drinking water served from groundwater sources to 65 people, tracked in EPA SDWIS and UCMR5.

65
People served
221
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 221 drinking-water violations at Rio Vista NV LLC, 2% of them health-based - above the Nevada per-system average.

221
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
65
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Rio Vista NV LLC

Rio Vista NV LLC is a private-owned community water system that delivers drinking water to 65 residents in Verdi, Nevada (Washoe County) through 62 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 221 total violations for this system , of which 5 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 189 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Chlorine, recorded in 29 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Nevada, EPA tracks 589 public water systems serving 3,455,285 people, with 56,333 cumulative violations and 6,657 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 95.6 violations. Statewide, 50 of 57 UCMR5-tested systems have reported PFAS detections (87.7%).

Rio Vista NV LLC's 221 violations sit above the Nevada average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
65
Total Violations
221
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
62
County
Washoe
School/Daycare
No
MCL Violations
5
Monitoring Violations
189
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 29 2020
Lead and Copper Rule MR 8 2010
Coliform (TCR) MR 8 2015
Consumer Confidence Rule Other 6 2010
1,2,4-Trichlorobenzene MR 6 2008
o-Dichlorobenzene MR 6 2008
Vinyl chloride MR 6 2008
1,1-Dichloroethylene MR 6 2008
1,2-Dichloroethane MR 6 2008
1,2-Dichloropropane MR 6 2008
Trichloroethylene MR 6 2008
Tetrachloroethylene MR 6 2008
CHLOROBENZENE MR 6 2008
Styrene MR 6 2008
cis-1,2-Dichloroethylene MR 6 2008
Carbon tetrachloride MR 6 2008
1,1,2-Trichloroethane MR 6 2008
Nitrite MR 6 2011
p-Dichlorobenzene MR 6 2008
Benzene MR 6 2008
DICHLOROMETHANE MR 6 2008
trans-1,2-Dichloroethylene MR 6 2008
Ethylbenzene MR 6 2008
Xylenes, Total MR 6 2008
Toluene MR 6 2008
1,1,1-Trichloroethane MR 6 2008
Total Haloacetic Acids (HAA5) MR 5 2007
Coliform (TCR) MCL 5 2015
TTHM MR 5 2007
Nitrate MR 2 2010

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Rio Vista NV LLC.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID NV0000191 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Nevada Drinking Water Authority

Nevada's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find NV regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2020 Chlorine MR 29 SDWIS / NV0000191 / 0999
2015 Coliform (TCR) MR 8 SDWIS / NV0000191 / 3100
2015 Coliform (TCR) MCL 5 SDWIS / NV0000191 / 3100
2011 Nitrite MR 6 SDWIS / NV0000191 / 1041
2010 Lead and Copper Rule MR 8 SDWIS / NV0000191 / 5000
2010 Consumer Confidence Rule Other 6 SDWIS / NV0000191 / 7000
2010 Nitrate MR 2 SDWIS / NV0000191 / 1040
2008 1,2,4-Trichlorobenzene MR 6 SDWIS / NV0000191 / 2378
2008 o-Dichlorobenzene MR 6 SDWIS / NV0000191 / 2968
2008 Vinyl chloride MR 6 SDWIS / NV0000191 / 2976
2008 1,1-Dichloroethylene MR 6 SDWIS / NV0000191 / 2977
2008 1,2-Dichloroethane MR 6 SDWIS / NV0000191 / 2980
2008 1,2-Dichloropropane MR 6 SDWIS / NV0000191 / 2983
2008 Trichloroethylene MR 6 SDWIS / NV0000191 / 2984
2008 Tetrachloroethylene MR 6 SDWIS / NV0000191 / 2987

How Rio Vista NV LLC Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Rio Vista NV LLC Nevada avg Federal benchmark
Total violations 221 95.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 11.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 87.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 65 5,866 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 589 regulated public water systems in Nevada.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Rio Vista NV LLC water safe to drink? ▼
Rio Vista NV LLC (PWS ID: NV0000191) has 221 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 65 people using Groundwater sources.
How many people does Rio Vista NV LLC serve? ▼
Rio Vista NV LLC serves 65 people in Verdi, Nevada. It is a Private-owned system using Groundwater water sources with 62 service connections.
What type of violations does Rio Vista NV LLC have? ▼
Rio Vista NV LLC has 221 total violations: 5 health-based violations (MCL exceedances or treatment failures), 189 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Rio Vista NV LLC water? ▼
No PFAS testing data is available for Rio Vista NV LLC under the EPA's UCMR5 monitoring program.
What water source does Rio Vista NV LLC use? ▼
Rio Vista NV LLC uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.