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Community Water System · PWS ID3140118

Sunlight Terrace

Middleton, Idaho 83644 - drinking water served from groundwater sources to 234 people, tracked in EPA SDWIS and UCMR5.

234
People served
87
EPA violations
45
Health-based
Untested
UCMR5 result

The verdict

EPA records 87 drinking-water violations at Sunlight Terrace, 52% of them health-based - above the Idaho per-system average.

87
Total EPA violations on record
52%
Health-based (MCL / treatment failure)
234
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sunlight Terrace

Sunlight Terrace is a private-owned community water system that delivers drinking water to 234 residents in Middleton, Idaho (Canyon County) through 66 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 87 total violations for this system , of which 45 (52%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 33 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Combined Uranium, recorded in 42 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. Statewide, 40 of 60 UCMR5-tested systems have reported PFAS detections (66.7%).

Sunlight Terrace's 87 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
234
Total Violations
87
Health-Based Violations
45
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
66
County
Canyon
School/Daycare
No
MCL Violations
45
Monitoring Violations
33
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Uranium MCL 42 2011
Combined Uranium MR 20 2021
Groundwater Rule Other 7 2021
Coliform (TCR) MCL 3 2014
Gross Alpha, Excl. Radon and U MR 3 2021
Nitrate MR 3 2022
Coliform (TCR) MR 3 2007
OXAMYL MR 2 2020
Carbofuran MR 2 2020
Public Notice Other 1 2011

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 Sunlight Terrace.

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 ID3140118 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
2022 Nitrate MR 3 SDWIS / ID3140118 / 1040
2021 Combined Uranium MR 20 SDWIS / ID3140118 / 4006
2021 Groundwater Rule Other 7 SDWIS / ID3140118 / 0700
2021 Gross Alpha, Excl. Radon and U MR 3 SDWIS / ID3140118 / 4000
2020 OXAMYL MR 2 SDWIS / ID3140118 / 2036
2020 Carbofuran MR 2 SDWIS / ID3140118 / 2046
2014 Coliform (TCR) MCL 3 SDWIS / ID3140118 / 3100
2011 Combined Uranium MCL 42 SDWIS / ID3140118 / 4006
2011 Public Notice Other 1 SDWIS / ID3140118 / 7500
2007 Coliform (TCR) MR 3 SDWIS / ID3140118 / 3100

How Sunlight Terrace Compares

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

Metric Sunlight Terrace Idaho avg Federal benchmark
Total violations 87 52.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 45 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 234 870 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 Sunlight Terrace water safe to drink? ▼
Sunlight Terrace (PWS ID: ID3140118) has 87 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 234 people using Groundwater sources.
How many people does Sunlight Terrace serve? ▼
Sunlight Terrace serves 234 people in Middleton, Idaho. It is a Private-owned system using Groundwater water sources with 66 service connections.
What type of violations does Sunlight Terrace have? ▼
Sunlight Terrace has 87 total violations: 45 health-based violations (MCL exceedances or treatment failures), 33 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sunlight Terrace water? ▼
No PFAS testing data is available for Sunlight Terrace under the EPA's UCMR5 monitoring program.
What water source does Sunlight Terrace use? ▼
Sunlight Terrace 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.