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Non-Transient Non-Community Water System · PWS ID1280091

Silverwood

Athol, Idaho 83801 - drinking water served from groundwater sources to 3,930 people, tracked in EPA SDWIS and UCMR5.

3,930
People served
88
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 88 drinking-water violations at Silverwood, 2% of them health-based - above the Idaho per-system average.

88
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
3,930
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Silverwood

Silverwood is a private-owned non-transient non-community water system that delivers drinking water to 3,930 residents in Athol, Idaho (Kootenai County) through 55 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 88 total violations for this system , of which 2 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 84 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Revised Total Coliform Rule, recorded in 12 violations (MON). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Idaho, EPA tracks 2,005 public water systems serving 1,743,912 people, with 104,850 cumulative violations and 19,965 health-based violations on record. About 96% of systems in the state carry at least one violation, and state-wide the average per system is 52.3 violations. Statewide, 40 of 60 UCMR5-tested systems have reported PFAS detections (66.7%).

Silverwood's 88 violations sit above the Idaho 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
3,930
Total Violations
88
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
55
County
Kootenai
School/Daycare
No
MCL Violations
2
Monitoring Violations
84
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Revised Total Coliform Rule MON 12 2024
Lead and Copper Rule MR 8 2009
Nitrate MR 4 2006
Cadmium MR 3 2008
Chromium MR 3 2008
Barium MR 3 2008
Arsenic MR 3 2008
Selenium MR 3 2008
Mercury MR 3 2008
Nickel MR 2 2008
Antimony, Total MR 2 2008
Beryllium, Total MR 2 2008
Thallium, Total MR 2 2008
Public Notice Other 2 2011
Coliform (TCR) MCL 2 2002
Coliform (TCR) MR 2 2012
Pentachlorophenol MR 1 1993
Methoxychlor MR 1 1993
Toxaphene MR 1 1993
Total Polychlorinated Biphenyls (PCB) MR 1 1993
Benzene MR 1 1993
Carbon tetrachloride MR 1 1993
cis-1,2-Dichloroethylene MR 1 1993
1,2-Dichloroethane MR 1 1993
o-Dichlorobenzene MR 1 1993
p-Dichlorobenzene MR 1 1993
CHLOROBENZENE MR 1 1993
Styrene MR 1 1993
ETHYLENE DIBROMIDE MR 1 1993
Tetrachloroethylene MR 1 1993

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 Silverwood.

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 ID1280091 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Idaho Drinking Water Authority

Idaho'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 ID 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
2024 Revised Total Coliform Rule MON 12 SDWIS / ID1280091 / 8000
2012 Coliform (TCR) MR 2 SDWIS / ID1280091 / 3100
2011 Public Notice Other 2 SDWIS / ID1280091 / 7500
2009 Lead and Copper Rule MR 8 SDWIS / ID1280091 / 5000
2008 Cadmium MR 3 SDWIS / ID1280091 / 1015
2008 Chromium MR 3 SDWIS / ID1280091 / 1020
2008 Barium MR 3 SDWIS / ID1280091 / 1010
2008 Arsenic MR 3 SDWIS / ID1280091 / 1005
2008 Selenium MR 3 SDWIS / ID1280091 / 1045
2008 Mercury MR 3 SDWIS / ID1280091 / 1035
2008 Nickel MR 2 SDWIS / ID1280091 / 1036
2008 Antimony, Total MR 2 SDWIS / ID1280091 / 1074
2008 Beryllium, Total MR 2 SDWIS / ID1280091 / 1075
2008 Thallium, Total MR 2 SDWIS / ID1280091 / 1085
2006 Nitrate MR 4 SDWIS / ID1280091 / 1040

How Silverwood Compares

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

Metric Silverwood Idaho avg Federal benchmark
Total violations 88 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 10 Indicates a contaminant exceeded a federal MCL
PFAS detection None 66.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 3,930 870 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,005 regulated public water systems in Idaho.

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 Silverwood water safe to drink? ▼
Silverwood (PWS ID: ID1280091) has 88 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,930 people using Groundwater sources.
How many people does Silverwood serve? ▼
Silverwood serves 3,930 people in Athol, Idaho. It is a Private-owned system using Groundwater water sources with 55 service connections.
What type of violations does Silverwood have? ▼
Silverwood has 88 total violations: 2 health-based violations (MCL exceedances or treatment failures), 84 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Silverwood water? ▼
No PFAS testing data is available for Silverwood under the EPA's UCMR5 monitoring program.
What water source does Silverwood use? ▼
Silverwood uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.