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Community Water System · PWS NV0004021

Silver Knolls Mutual Water Company

Reno, Nevada 89508 - drinking water served from groundwater sources to 120 people, tracked in EPA SDWIS and UCMR5.

120
People served
671
EPA violations
147
Health-based
Untested
UCMR5 result

The verdict

EPA records 671 drinking-water violations at Silver Knolls Mutual Water Company, 22% of them health-based - above the Nevada per-system average.

671
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
120
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Silver Knolls Mutual Water Company

Silver Knolls Mutual Water Company is a private-owned community water system that delivers drinking water to 120 residents in Reno, Nevada (Washoe County) through 63 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 671 total violations for this system , of which 147 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 478 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Arsenic, recorded in 130 violations (MCL, health-based). 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%).

Silver Knolls Mutual Water Company's 671 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
120
Total Violations
671
Health-Based Violations
147
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
63
County
Washoe
School/Daycare
No
MCL Violations
131
Monitoring Violations
478
Treatment Tech Violations
16

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 130 2025
Arsenic MR 23 2014
Coliform (TCR) MR 17 2015
Groundwater Rule TT 16 2018
Tetrachloroethylene MR 15 2014
Vinyl chloride MR 15 2014
Chlorine MR 14 2005
Nitrate MR 12 2003
Xylenes, Total MR 12 2003
o-Dichlorobenzene MR 12 2003
p-Dichlorobenzene MR 12 2003
trans-1,2-Dichloroethylene MR 12 2003
1,2-Dichloroethane MR 12 2003
1,1,1-Trichloroethane MR 12 2003
Carbon tetrachloride MR 12 2003
Ethylbenzene MR 12 2003
Styrene MR 12 2003
1,2,4-Trichlorobenzene MR 12 2003
DICHLOROMETHANE MR 12 2003
cis-1,2-Dichloroethylene MR 12 2003
1,1-Dichloroethylene MR 12 2003
1,2-Dichloropropane MR 12 2003
Trichloroethylene MR 12 2003
CHLOROBENZENE MR 12 2003
Benzene MR 12 2003
Toluene MR 12 2003
1,1,2-Trichloroethane MR 12 2003
Consumer Confidence Rule Other 10 2013
Lead and Copper Rule MR 8 2004
Antimony, Total MR 6 2002

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 Silver Knolls Mutual Water Company.

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 NV0004021 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
2025 Arsenic MCL 130 SDWIS / NV0004021 / 1005
2021 Revised Total Coliform Rule RPT 3 SDWIS / NV0004021 / 8000
2018 Groundwater Rule TT 16 SDWIS / NV0004021 / 0700
2016 TTHM MR 4 SDWIS / NV0004021 / 2950
2016 Total Haloacetic Acids (HAA5) MR 4 SDWIS / NV0004021 / 2456
2015 Coliform (TCR) MR 17 SDWIS / NV0004021 / 3100
2014 Arsenic MR 23 SDWIS / NV0004021 / 1005
2014 Tetrachloroethylene MR 15 SDWIS / NV0004021 / 2987
2014 Vinyl chloride MR 15 SDWIS / NV0004021 / 2976
2013 Consumer Confidence Rule Other 10 SDWIS / NV0004021 / 7000
2011 Coliform (TCR) MCL 1 SDWIS / NV0004021 / 3100
2005 Chlorine MR 14 SDWIS / NV0004021 / 0999
2004 Lead and Copper Rule MR 8 SDWIS / NV0004021 / 5000
2003 Nitrate MR 12 SDWIS / NV0004021 / 1040
2003 Xylenes, Total MR 12 SDWIS / NV0004021 / 2955

How Silver Knolls Mutual Water Company Compares

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

Metric Silver Knolls Mutual Water Company Nevada avg Federal benchmark
Total violations 671 95.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 147 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 120 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 Silver Knolls Mutual Water Company water safe to drink? ▼
Silver Knolls Mutual Water Company (PWS ID: NV0004021) has 671 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 120 people using Groundwater sources.
How many people does Silver Knolls Mutual Water Company serve? ▼
Silver Knolls Mutual Water Company serves 120 people in Reno, Nevada. It is a Private-owned system using Groundwater water sources with 63 service connections.
What type of violations does Silver Knolls Mutual Water Company have? ▼
Silver Knolls Mutual Water Company has 671 total violations: 147 health-based violations (MCL exceedances or treatment failures), 478 monitoring/reporting violations, and 16 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Silver Knolls Mutual Water Company water? ▼
No PFAS testing data is available for Silver Knolls Mutual Water Company under the EPA's UCMR5 monitoring program.
What water source does Silver Knolls Mutual Water Company use? ▼
Silver Knolls Mutual Water Company 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.