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Community Water System · PWS AR0000504

Greenwood Waterworks

Greenwood, Arkansas 72936-0000 - drinking water served from surface water sources to 9,905 people, tracked in EPA SDWIS and UCMR5.

9,905
People served
363
EPA violations
196
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 363 drinking-water violations at Greenwood Waterworks, 54% of them health-based - above the Arkansas per-system average.

363
Total EPA violations on record
54%
Health-based (MCL / treatment failure)
9,905
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Greenwood Waterworks

Greenwood Waterworks is a local-owned community water system that delivers drinking water to 9,905 residents in Greenwood, Arkansas (Sebastian County) through 3,922 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 363 total violations for this system , of which 196 (54%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 136 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is TTHM, recorded in 137 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Arkansas, EPA tracks 1,016 public water systems serving 3,049,400 people, with 53,437 cumulative violations and 21,598 health-based violations on record. About 94% of systems in the state carry at least one violation, and state-wide the average per system is 52.6 violations. Statewide, 57 of 172 UCMR5-tested systems have reported PFAS detections (33.1%).

Greenwood Waterworks's 363 violations sit above the Arkansas 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
9,905
Total Violations
363
Health-Based Violations
196
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
3,922
County
Sebastian
School/Daycare
No
MCL Violations
169
Monitoring Violations
136
Treatment Tech Violations
27

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 137 2013
Interim Enhanced Surface Water Treatment Rule MR 42 2005
Surface Water Treatment Rule MR 36 2003
Chlorite MR 36 2007
Coliform (TCR) MCL 29 2009
CARBON, TOTAL TT 27 2006
Coliform (TCR) MR 16 2011
Surface Water Treatment Rule Other 8 1996
Coliform (TCR) Other 6 1996
Chlorine dioxide MR 4 2023
Chlorite MCL 3 2010
Revised Total Coliform Rule MON 2 2021
Public Notice Other 1 2022

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
PFTA 7/12/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 7/12/2023 <7.00 ppt 7.00 ppt Not Detected
PFMPA 7/12/2023 <4.00 ppt 4.00 ppt Not Detected
NEtFOSAA 7/12/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 7/12/2023 <6.00 ppt 6.00 ppt Not Detected
PFHpS 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 7/12/2023 <4.00 ppt 4.00 ppt Not Detected
NFDHA 7/12/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/12/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 7/12/2023 <5.00 ppt 5.00 ppt Not Detected
PFHxS 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFBA 7/12/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 7/12/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 7/12/2023 <2.00 ppt 2.00 ppt Not Detected
PFDoA 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 7/12/2023 <5.00 ppt 5.00 ppt Not Detected
PFOA 7/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 7/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 7/12/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpA 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 7/12/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 7/12/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 5/31/2023 <2.00 ppt 2.00 ppt Not Detected
PFMBA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 5/31/2023 <20.00 ppt 20.00 ppt Not Detected
PFHpS 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 5/31/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 5/31/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 5/31/2023 <2.00 ppt 2.00 ppt Not Detected
6:2 FTS 5/31/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 5/31/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 5/31/2023 <5.00 ppt 5.00 ppt Not Detected
PFDoA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 5/31/2023 <4.00 ppt 4.00 ppt Not Detected
PFBS 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 5/31/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpA 5/31/2023 <3.00 ppt 3.00 ppt Not Detected
PFMPA 5/31/2023 <4.00 ppt 4.00 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 Greenwood Waterworks.

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 AR0000504 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Arkansas Drinking Water Authority

Arkansas'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 AR 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
2023 Chlorine dioxide MR 4 SDWIS / AR0000504 / 1008
2022 Public Notice Other 1 SDWIS / AR0000504 / 7500
2021 Revised Total Coliform Rule MON 2 SDWIS / AR0000504 / 8000
2013 TTHM MCL 137 SDWIS / AR0000504 / 2950
2011 Coliform (TCR) MR 16 SDWIS / AR0000504 / 3100
2010 Chlorite MCL 3 SDWIS / AR0000504 / 1009
2009 Coliform (TCR) MCL 29 SDWIS / AR0000504 / 3100
2007 Chlorite MR 36 SDWIS / AR0000504 / 1009
2006 CARBON, TOTAL TT 27 SDWIS / AR0000504 / 2920
2005 Interim Enhanced Surface Water Treatment Rule MR 42 SDWIS / AR0000504 / 0300
2003 Surface Water Treatment Rule MR 36 SDWIS / AR0000504 / 0200
1996 Surface Water Treatment Rule Other 8 SDWIS / AR0000504 / 0200
1996 Coliform (TCR) Other 6 SDWIS / AR0000504 / 3100

How Greenwood Waterworks Compares

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

Metric Greenwood Waterworks Arkansas avg Federal benchmark
Total violations 363 52.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 196 21.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 33.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 9,905 3,001 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,016 regulated public water systems in Arkansas.

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 Greenwood Waterworks water safe to drink? ▼
Greenwood Waterworks (PWS ID: AR0000504) has 363 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 9,905 people using Surface Water sources.
How many people does Greenwood Waterworks serve? ▼
Greenwood Waterworks serves 9,905 people in Greenwood, Arkansas. It is a Local-owned system using Surface Water water sources with 3,922 service connections.
What type of violations does Greenwood Waterworks have? ▼
Greenwood Waterworks has 363 total violations: 196 health-based violations (MCL exceedances or treatment failures), 136 monitoring/reporting violations, and 27 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Greenwood Waterworks water? ▼
No. Greenwood Waterworks was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Greenwood Waterworks use? ▼
Greenwood Waterworks uses Surface Water 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.

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.