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Community Water System · PWS ID1280041

Cave Bay Community System

Worley, Idaho 83876 - drinking water served from groundwater sources to 458 people, tracked in EPA SDWIS and UCMR5.

458
People served
107
EPA violations
11
Health-based
Untested
UCMR5 result

The verdict

EPA records 107 drinking-water violations at Cave Bay Community System, 10% of them health-based - above the Idaho per-system average.

107
Total EPA violations on record
10%
Health-based (MCL / treatment failure)
458
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Cave Bay Community System

Cave Bay Community System is a private-owned community water system that delivers drinking water to 458 residents in Worley, Idaho (Kootenai County) through 183 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 107 total violations for this system , of which 11 (10%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 88 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 Chlorine, recorded in 8 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 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%).

Cave Bay Community System's 107 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
458
Total Violations
107
Health-Based Violations
11
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
183
County
Kootenai
School/Daycare
No
MCL Violations
7
Monitoring Violations
88
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 8 2023
Coliform (TCR) MCL 7 2004
Lead and Copper Rule MR 5 2023
Arsenic MR 4 2020
Nitrate MR 4 2022
LEAD AND COPPER RULE REVISIONS TT 4 2024
Revised Total Coliform Rule MON 3 2023
LEAD AND COPPER RULE REVISIONS RPT 3 2024
Coliform (TCR) MR 3 2004
Public Notice Other 3 2019
Picloram MR 2 1996
2,4,5-TP MR 2 1996
cis-1,2-Dichloroethylene MR 2 1996
Xylenes, Total MR 2 1996
DICHLOROMETHANE MR 2 1996
Carbon tetrachloride MR 2 1996
1,2-Dichloropropane MR 2 1996
CHLOROBENZENE MR 2 1996
Benzene MR 2 1996
Toluene MR 2 1996
Radium-228 MR 2 2014
Radium-226 MR 2 2014
1,1,1-Trichloroethane MR 2 1996
1,2,4-Trichlorobenzene MR 2 1996
trans-1,2-Dichloroethylene MR 2 1996
2,4-D MR 2 1996
1,2-Dichloroethane MR 2 1996
Ethylbenzene MR 2 1996
Dalapon MR 2 1996
Trichloroethylene MR 2 1996

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 Cave Bay Community System.

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 ID1280041 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 LEAD AND COPPER RULE REVISIONS TT 4 SDWIS / ID1280041 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 3 SDWIS / ID1280041 / 5200
2023 Chlorine MR 8 SDWIS / ID1280041 / 0999
2023 Lead and Copper Rule MR 5 SDWIS / ID1280041 / 5000
2023 Revised Total Coliform Rule MON 3 SDWIS / ID1280041 / 8000
2023 Total Haloacetic Acids (HAA5) MR 1 SDWIS / ID1280041 / 2456
2023 TTHM MR 1 SDWIS / ID1280041 / 2950
2022 Nitrate MR 4 SDWIS / ID1280041 / 1040
2020 Arsenic MR 4 SDWIS / ID1280041 / 1005
2019 Public Notice Other 3 SDWIS / ID1280041 / 7500
2017 Combined Uranium MR 2 SDWIS / ID1280041 / 4006
2014 Radium-228 MR 2 SDWIS / ID1280041 / 4030
2014 Radium-226 MR 2 SDWIS / ID1280041 / 4020
2004 Coliform (TCR) MCL 7 SDWIS / ID1280041 / 3100
2004 Coliform (TCR) MR 3 SDWIS / ID1280041 / 3100

How Cave Bay Community System Compares

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

Metric Cave Bay Community System Idaho avg Federal benchmark
Total violations 107 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 11 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 458 870 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 Cave Bay Community System water safe to drink? ▼
Cave Bay Community System (PWS ID: ID1280041) has 107 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 458 people using Groundwater sources.
How many people does Cave Bay Community System serve? ▼
Cave Bay Community System serves 458 people in Worley, Idaho. It is a Private-owned system using Groundwater water sources with 183 service connections.
What type of violations does Cave Bay Community System have? ▼
Cave Bay Community System has 107 total violations: 11 health-based violations (MCL exceedances or treatment failures), 88 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Cave Bay Community System water? ▼
No PFAS testing data is available for Cave Bay Community System under the EPA's UCMR5 monitoring program.
What water source does Cave Bay Community System use? ▼
Cave Bay Community System 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.