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ARROWROCK RANCH

PWS ID: ID4010247 · MERIDIAN, Idaho 83680

ARROWROCK RANCH serves 250 people in MERIDIAN, Idaho using Groundwater water sources. It has 107 recorded EPA violations, including 4 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: ARROWROCK RANCH

ARROWROCK RANCH is a private-owned community water system that delivers drinking water to 250 residents in MERIDIAN, Idaho (Ada County) through 100 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 4 (4%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 103 monitoring and reporting violations are on file. The most recent violation on record dates to 2013.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 4 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 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. ARROWROCK RANCH's 107 violations sit above the Idaho average. Statewide, 40 of 60 UCMR5-tested systems have reported PFAS detections (66.7%). 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
250
Total Violations
107
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
100
County
Ada
School/Daycare
No
MCL Violations
4
Monitoring Violations
103
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 4 2013
Carbon tetrachloride MR 2 2007
1,1,2-Trichloroethane MR 2 2007
Toluene MR 2 2007
BHC-GAMMA MR 2 2007
Heptachlor MR 2 2007
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2007
2,4,5-TP MR 2 2007
Endrin MR 2 2007
Chlordane MR 2 2007
Glyphosate MR 2 2007
Atrazine MR 2 2007
Heptachlor epoxide MR 2 2007
1,2-Dichloropropane MR 2 2007
Tetrachloroethylene MR 2 2007
p-Dichlorobenzene MR 2 2007
Di(2-ethylhexyl) adipate MR 2 2007
CHLOROBENZENE MR 2 2007
Carbofuran MR 2 2007
HEXACHLOROBENZENE MR 2 2007
2,4-D MR 2 2007
LASSO MR 2 2007
o-Dichlorobenzene MR 2 2007
DICHLOROMETHANE MR 2 2007
1,1-Dichloroethylene MR 2 2007
Radium-226 MR 2 2008
Vinyl chloride MR 2 2007
Xylenes, Total MR 2 2007
Dinoseb MR 2 2007
Diquat MR 2 2007

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 ARROWROCK RANCH.

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 ID4010247 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
2013 Coliform (TCR) MCL 4 SDWIS / ID4010247 / 3100
2008 Radium-226 MR 2 SDWIS / ID4010247 / 4020
2007 Carbon tetrachloride MR 2 SDWIS / ID4010247 / 2982
2007 1,1,2-Trichloroethane MR 2 SDWIS / ID4010247 / 2985
2007 Toluene MR 2 SDWIS / ID4010247 / 2991
2007 BHC-GAMMA MR 2 SDWIS / ID4010247 / 2010
2007 Heptachlor MR 2 SDWIS / ID4010247 / 2065
2007 1,2-DIBROMO-3-CHLOROPROPANE MR 2 SDWIS / ID4010247 / 2931
2007 2,4,5-TP MR 2 SDWIS / ID4010247 / 2110
2007 Endrin MR 2 SDWIS / ID4010247 / 2005
2007 Chlordane MR 2 SDWIS / ID4010247 / 2959
2007 Glyphosate MR 2 SDWIS / ID4010247 / 2034
2007 Atrazine MR 2 SDWIS / ID4010247 / 2050
2007 Heptachlor epoxide MR 2 SDWIS / ID4010247 / 2067
2007 1,2-Dichloropropane MR 2 SDWIS / ID4010247 / 2983

How ARROWROCK RANCH Compares

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

Metric ARROWROCK RANCH Idaho avg Federal benchmark
Total violations 107 52.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 4 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 250 870 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is ARROWROCK RANCH water safe to drink? ▼
ARROWROCK RANCH (PWS ID: ID4010247) has 107 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 250 people using Groundwater sources.
How many people does ARROWROCK RANCH serve? ▼
ARROWROCK RANCH serves 250 people in MERIDIAN, Idaho. It is a Private-owned system using Groundwater water sources with 100 service connections.
What type of violations does ARROWROCK RANCH have? ▼
ARROWROCK RANCH has 107 total violations: 4 health-based violations (MCL exceedances or treatment failures), 103 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in ARROWROCK RANCH water? ▼
No PFAS testing data is available for ARROWROCK RANCH under the EPA's UCMR5 monitoring program.
What water source does ARROWROCK RANCH use? ▼
ARROWROCK RANCH 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.

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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.

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