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Community Water System · PWS MO2024313

Knox County Public Water & Sewer Dist 1

Knox City, Missouri 63446-0000 - drinking water served from surface water sources to 3,947 people, tracked in EPA SDWIS and UCMR5.

3,947
People served
41
EPA violations
4
Health-based
1 PFAS
UCMR5 result

The verdict

EPA records 41 drinking-water violations at Knox County Public Water & Sewer Dist 1, 10% of them health-based - below the Missouri per-system average, and UCMR5 testing detected 1 PFAS compound.

41
Total EPA violations on record
10%
Health-based (MCL / treatment failure)
3,947
People served by this system
1
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Knox County Public Water & Sewer Dist 1

Knox County Public Water & Sewer Dist 1 is a local-owned community water system that delivers drinking water to 3,947 residents in Knox City, Missouri (Knox County) through 1,793 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 41 total violations for this system , of which 4 (10%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 35 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is TTHM, recorded in 15 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 8.7 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Missouri, EPA tracks 2,823 public water systems serving 5,855,885 people, with 201,695 cumulative violations and 54,821 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 71.4 violations. Statewide, 162 of 230 UCMR5-tested systems have reported PFAS detections (70.4%).

Knox County Public Water & Sewer Dist 1's 41 violations sit below the Missouri average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
3,947
Total Violations
41
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
1,793
County
Knox
School/Daycare
No
MCL Violations
4
Monitoring Violations
35
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MR 15 2025
Total Haloacetic Acids (HAA5) MR 15 2025
Coliform (TCR) MR 4 2013
Coliform (TCR) MCL 4 2009
Long Term 2 Enhanced Surface Water Treatment Rule Other 1 2016
Lead and Copper Rule MR 1 2024
Consumer Confidence Rule Other 1 2006

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 8 of 347 samples detected PFAS.

Contaminant Date Result MRL Status
PFOS 9/9/2024 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 9/9/2024 <5.00 ppt 5.00 ppt Not Detected
PFNA 9/9/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxS 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 9/9/2024 <4.00 ppt 4.00 ppt Not Detected
PFMPA 9/9/2024 <4.00 ppt 4.00 ppt Not Detected
11Cl-PF3OUdS 9/9/2024 <5.00 ppt 5.00 ppt Not Detected
PFPeA 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 9/9/2024 <5.00 ppt 5.00 ppt Not Detected
NFDHA 9/9/2024 <20.00 ppt 20.00 ppt Not Detected
PFEESA 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpS 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeS 9/9/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxA 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
PFBA 9/9/2024 5.90 ppt 5.00 ppt Detected
HFPO-DA 9/9/2024 <5.00 ppt 5.00 ppt Not Detected
ADONA 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 9/9/2024 <2.00 ppt 2.00 ppt Not Detected
PFUnA 9/9/2024 <2.00 ppt 2.00 ppt Not Detected
PFDoA 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 9/9/2024 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 8/12/2024 <7.00 ppt 7.00 ppt Not Detected
PFTA 8/12/2024 <8.00 ppt 8.00 ppt Not Detected
NMeFOSAA 8/12/2024 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 8/12/2024 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 8/12/2024 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 8/12/2024 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 8/12/2024 <6.00 ppt 6.00 ppt Not Detected
PFTA 8/12/2024 <8.00 ppt 8.00 ppt Not Detected
NMeFOSAA 8/12/2024 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 8/12/2024 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 8/12/2024 <7.00 ppt 7.00 ppt Not Detected
PFTA 8/12/2024 <8.00 ppt 8.00 ppt Not Detected
PFOA 6/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeS 6/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFEESA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 6/24/2024 <5.00 ppt 5.00 ppt Not Detected
8:2 FTS 6/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFUnA 6/24/2024 <2.00 ppt 2.00 ppt Not Detected
PFMBA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 6/24/2024 <2.00 ppt 2.00 ppt Not Detected
PFMPA 6/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFHxA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpS 6/24/2024 <3.00 ppt 3.00 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 Knox County Public Water & Sewer Dist 1.

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 MO2024313 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Missouri Drinking Water Authority

Missouri DNR, Public Drinking Water Branch is the primacy agency that licenses and inspects Knox County Public Water & Sewer Dist 1 under EPA-delegated authority.

Open MO regulator portal

Source: Missouri DNR, Public Drinking Water Branch

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
2025 TTHM MR 15 SDWIS / MO2024313 / 2950
2025 Total Haloacetic Acids (HAA5) MR 15 SDWIS / MO2024313 / 2456
2024 Lead and Copper Rule MR 1 SDWIS / MO2024313 / 5000
2016 Long Term 2 Enhanced Surface Water Treatment Rule Other 1 SDWIS / MO2024313 / 0800
2013 Coliform (TCR) MR 4 SDWIS / MO2024313 / 3100
2009 Coliform (TCR) MCL 4 SDWIS / MO2024313 / 3100
2006 Consumer Confidence Rule Other 1 SDWIS / MO2024313 / 7000

How Knox County Public Water & Sewer Dist 1 Compares

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

Metric Knox County Public Water & Sewer Dist 1 Missouri avg Federal benchmark
Total violations 41 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 19.4 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 70.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 3,947 2,074 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,823 regulated public water systems in Missouri.

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 Knox County Public Water & Sewer Dist 1 water safe to drink?
Knox County Public Water & Sewer Dist 1 (PWS ID: MO2024313) has 41 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 3,947 people using Surface Water sources.
How many people does Knox County Public Water & Sewer Dist 1 serve?
Knox County Public Water & Sewer Dist 1 serves 3,947 people in Knox City, Missouri. It is a Local-owned system using Surface Water water sources with 1,793 service connections.
What type of violations does Knox County Public Water & Sewer Dist 1 have?
Knox County Public Water & Sewer Dist 1 has 41 total violations: 4 health-based violations (MCL exceedances or treatment failures), 35 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Knox County Public Water & Sewer Dist 1 water?
Yes. UCMR5 testing detected 1 PFAS compound in Knox County Public Water & Sewer Dist 1's water supply: PFBA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Knox County Public Water & Sewer Dist 1 use?
Knox County Public Water & Sewer Dist 1 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.
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.