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Community Water System · PWS HI0000345

Schofield Barracks

Schofield Barracks, Hawaii 96857-5013 - drinking water served from groundwater sources to 37,920 people, tracked in EPA SDWIS and UCMR5.

37,920
People served
23
EPA violations
5
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 23 drinking-water violations at Schofield Barracks, 22% of them health-based - below the Hawaii per-system average.

23
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
37,920
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Schofield Barracks

Schofield Barracks is a federal-owned community water system that delivers drinking water to 37,920 residents in Schofield Barracks, Hawaii (Honolulu County) through 2,922 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 23 total violations for this system , of which 5 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 12 monitoring and reporting violations are on file. The most recent violation on record dates to 2010.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 6 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Hawaii, EPA tracks 137 public water systems serving 1,520,931 people, with 5,234 cumulative violations and 2,289 health-based violations on record. About 80% of systems in the state carry at least one violation, and state-wide the average per system is 38.2 violations. Statewide, 2 of 45 UCMR5-tested systems have reported PFAS detections (4.4%).

Schofield Barracks's 23 violations sit below the Hawaii 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
37,920
Total Violations
23
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Federal
Connections
2,922
County
Honolulu
School/Daycare
No
MCL Violations
5
Monitoring Violations
12
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 6 2010
Lead and Copper Rule MR 5 2003
Coliform (TCR) MCL 5 2008
Gross Alpha, Excl. Radon and U MR 1 2000

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.

Contaminant Date Result MRL Status
NFDHA 5/13/2024 <20.00 ppt 20.00 ppt Not Detected
PFUnA 5/13/2024 <2.00 ppt 2.00 ppt Not Detected
PFTA 5/13/2024 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 5/13/2024 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 5/13/2024 <6.00 ppt 6.00 ppt Not Detected
PFBS 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 5/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 5/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFOA 5/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpS 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeS 5/13/2024 <4.00 ppt 4.00 ppt Not Detected
11Cl-PF3OUdS 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 5/13/2024 <2.00 ppt 2.00 ppt Not Detected
ADONA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 5/13/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 5/13/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 5/13/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 11/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 11/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 11/14/2023 <2.00 ppt 2.00 ppt Not Detected
9Cl-PF3ONS 11/14/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxS 11/14/2023 <3.00 ppt 3.00 ppt Not Detected
ADONA 11/14/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 11/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFDA 11/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 11/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 11/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpA 11/14/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 11/14/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 11/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFTA 11/14/2023 <8.00 ppt 8.00 ppt Not Detected
PFOS 11/14/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 11/14/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 11/14/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 11/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 11/14/2023 <7.00 ppt 7.00 ppt Not Detected
PFPeS 11/14/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 11/14/2023 <20.00 ppt 20.00 ppt Not Detected

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 Schofield Barracks.

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 HI0000345 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Hawaii Drinking Water Authority

Hawaii'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 HI 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
2010 Coliform (TCR) MR 6 SDWIS / HI0000345 / 3100
2008 Coliform (TCR) MCL 5 SDWIS / HI0000345 / 3100
2003 Lead and Copper Rule MR 5 SDWIS / HI0000345 / 5000
2000 Gross Alpha, Excl. Radon and U MR 1 SDWIS / HI0000345 / 4000

How Schofield Barracks Compares

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

Metric Schofield Barracks Hawaii avg Federal benchmark
Total violations 23 38.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 16.7 Indicates a contaminant exceeded a federal MCL
PFAS detection None 4.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 37,920 11,102 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 137 regulated public water systems in Hawaii.

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 Schofield Barracks water safe to drink?
Schofield Barracks (PWS ID: HI0000345) has 23 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 37,920 people using Groundwater sources.
How many people does Schofield Barracks serve?
Schofield Barracks serves 37,920 people in Schofield Barracks, Hawaii. It is a Federal-owned system using Groundwater water sources with 2,922 service connections.
What type of violations does Schofield Barracks have?
Schofield Barracks has 23 total violations: 5 health-based violations (MCL exceedances or treatment failures), 12 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Schofield Barracks water?
No. Schofield Barracks was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Schofield Barracks use?
Schofield Barracks 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.
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.