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Community Water System · PWS MS0710011

Walker Switch Water Assn

Iuka, Mississippi 38852 - drinking water served from groundwater sources to 982 people, tracked in EPA SDWIS and UCMR5.

982
People served
23
EPA violations
3
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 23 drinking-water violations at Walker Switch Water Assn, 13% of them health-based - below the Mississippi per-system average.

23
Total EPA violations on record
13%
Health-based (MCL / treatment failure)
982
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Walker Switch Water Assn

Walker Switch Water Assn is a public/private-owned community water system that delivers drinking water to 982 residents in Iuka, Mississippi (Tishomingo County) through 372 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 3 (13%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 18 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 was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Mississippi, EPA tracks 1,185 public water systems serving 3,286,781 people, with 499,292 cumulative violations and 10,292 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 421.3 violations. Statewide, 160 of 238 UCMR5-tested systems have reported PFAS detections (67.2%).

Walker Switch Water Assn's 23 violations sit below the Mississippi 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
982
Total Violations
23
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Public/Private
Connections
372
County
Tishomingo
School/Daycare
No
MCL Violations
3
Monitoring Violations
18
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 8 2024
Coliform (TCR) MR 6 2011
Revised Total Coliform Rule MON 4 2019
Coliform (TCR) MCL 3 1994

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 33 samples detected PFAS.

Contaminant Date Result MRL Status
NMeFOSAA 6/14/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 6/14/2023 <5.00 ppt 5.00 ppt Not Detected
PFTA 6/14/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 6/14/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 12/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFDoA 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 12/19/2023 <8.00 ppt 8.00 ppt Not Detected
PFHpS 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 12/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFMPA 12/19/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 12/19/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 12/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 12/19/2023 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 12/19/2023 <5.00 ppt 5.00 ppt Not Detected
ADONA 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 12/19/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 12/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 12/19/2023 <7.00 ppt 7.00 ppt Not Detected
PFHxA 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 12/19/2023 <6.00 ppt 6.00 ppt Not Detected
PFDA 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 12/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 12/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 12/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 12/19/2023 <20.00 ppt 20.00 ppt Not Detected
PFEESA 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 12/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 12/19/2023 <2.00 ppt 2.00 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 Walker Switch Water Assn.

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 MS0710011 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Mississippi Drinking Water Authority

Mississippi'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 MS 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 Chlorine MR 8 SDWIS / MS0710011 / 0999
2019 Revised Total Coliform Rule MON 4 SDWIS / MS0710011 / 8000
2011 Coliform (TCR) MR 6 SDWIS / MS0710011 / 3100
1994 Coliform (TCR) MCL 3 SDWIS / MS0710011 / 3100

How Walker Switch Water Assn Compares

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

Metric Walker Switch Water Assn Mississippi avg Federal benchmark
Total violations 23 421.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 8.7 Indicates a contaminant exceeded a federal MCL
PFAS detection None 67.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 982 2,774 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,185 regulated public water systems in Mississippi.

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 Walker Switch Water Assn water safe to drink? ▼
Walker Switch Water Assn (PWS ID: MS0710011) has 23 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 982 people using Groundwater sources.
How many people does Walker Switch Water Assn serve? ▼
Walker Switch Water Assn serves 982 people in Iuka, Mississippi. It is a Public/Private-owned system using Groundwater water sources with 372 service connections.
What type of violations does Walker Switch Water Assn have? ▼
Walker Switch Water Assn has 23 total violations: 3 health-based violations (MCL exceedances or treatment failures), 18 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Walker Switch Water Assn water? ▼
No. Walker Switch Water Assn was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Walker Switch Water Assn use? ▼
Walker Switch Water Assn 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.

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.