CLEWISTON, CITY OF

Q: Is CLEWISTON, CITY OF water safe to drink?

CLEWISTON, CITY OF (PWS ID: FL5260053) has 86 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 9,600 people using Surface Water sources.

Q: What type of violations does CLEWISTON, CITY OF have?

CLEWISTON, CITY OF has 86 total violations: 14 health-based violations (MCL exceedances or treatment failures), 47 monitoring/reporting violations, and 14 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Q: Has PFAS been detected in CLEWISTON, CITY OF water?

No. CLEWISTON, CITY OF was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

Q: What water source does CLEWISTON, CITY OF use?

CLEWISTON, CITY OF uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Q: 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.

Reviewed byPlainWater Editorial, Drinking Water Quality Editorial Team · June 4, 2026

PWS ID: FL5260053 · CLEWISTON, Florida 33440

CLEWISTON, CITY OF serves 9,600 people in CLEWISTON, Florida using Surface Water water sources. It has 86 recorded EPA violations, including 14 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CLEWISTON, CITY OF

CLEWISTON, CITY OF is a local-owned community water system that delivers drinking water to 9,600 residents in CLEWISTON, Florida (Hendry County) through 3,840 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 86 total violations for this system , of which 14 (16%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 47 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 Lead and Copper Rule, recorded in 16 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 Florida, EPA tracks 5,093 public water systems serving 22,381,282 people, with 184,355 cumulative violations and 24,266 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 36.2 violations. CLEWISTON, CITY OF's 86 violations sit above the Florida average. Statewide, 218 of 402 UCMR5-tested systems have reported PFAS detections (54.2%). 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

9,600

Total Violations

Health-Based Violations

Water Source

Surface Water

System Details

System Type: Community
Owner Type: Local
Connections: 3,840
County: Hendry
School/Daycare: No
MCL Violations: 0
Monitoring Violations: 47
Treatment Tech Violations: 14

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Lead and Copper Rule	MR	16	1993
Lead and Copper Rule	Other	16	1993
Lead and Copper Rule	TT	12	1993
TTHM	MR	9	2024
Total Haloacetic Acids (HAA5)	MR	9	2024
Coliform (TCR)	MR	4	2006
Stage 2 Disinfectants and Disinfection Byproducts Rule	MR	4	2010
E. COLI	MR	3	2016
Public Notice	Other	3	2016
Interim Enhanced Surface Water Treatment Rule	MR	2	2006
Interim Enhanced Surface Water Treatment Rule	TT	2	2006

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 60 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFPeS	9/18/2024	<0.004 µg/L	0.004 µg/L	Not Detected
8:2 FTS	9/18/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFMPA	9/18/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFPeA	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFMBA	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
lithium	9/18/2024	<9 µg/L	9 µg/L	Not Detected
NFDHA	9/18/2024	<0.02 µg/L	0.02 µg/L	Not Detected
PFUnA	9/18/2024	<0.002 µg/L	0.002 µg/L	Not Detected
NMeFOSAA	9/18/2024	<0.006 µg/L	0.006 µg/L	Not Detected
PFEESA	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFHxA	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFTrDA	9/18/2024	<0.007 µg/L	0.007 µg/L	Not Detected
PFTA	9/18/2024	<0.008 µg/L	0.008 µg/L	Not Detected
4:2 FTS	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
6:2 FTS	9/18/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	9/18/2024	<0.005 µg/L	0.005 µg/L	Not Detected
HFPO-DA	9/18/2024	<0.005 µg/L	0.005 µg/L	Not Detected
ADONA	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	9/18/2024	<0.002 µg/L	0.002 µg/L	Not Detected
PFDoA	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
11Cl-PF3OUdS	9/18/2024	<0.005 µg/L	0.005 µg/L	Not Detected
NEtFOSAA	9/18/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFHpS	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFDA	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFOA	9/18/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	9/18/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFNA	9/18/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFHxS	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	9/18/2024	<0.003 µg/L	0.003 µg/L	Not Detected
4:2 FTS	3/6/2024	<0.003 µg/L	0.003 µg/L	Not Detected
9Cl-PF3ONS	3/6/2024	<0.002 µg/L	0.002 µg/L	Not Detected
PFMPA	3/6/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFHxA	3/6/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFDoA	3/6/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFDA	3/6/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFOA	3/6/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFOS	3/6/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFNA	3/6/2024	<0.004 µg/L	0.004 µg/L	Not Detected
PFHxS	3/6/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFHpA	3/6/2024	<0.003 µg/L	0.003 µg/L	Not Detected
PFBS	3/6/2024	<0.003 µg/L	0.003 µg/L	Not Detected
11Cl-PF3OUdS	3/6/2024	<0.005 µg/L	0.005 µg/L	Not Detected
ADONA	3/6/2024	<0.003 µg/L	0.003 µg/L	Not Detected
HFPO-DA	3/6/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFBA	3/6/2024	<0.005 µg/L	0.005 µg/L	Not Detected
PFTA	3/6/2024	<0.008 µg/L	0.008 µg/L	Not Detected
lithium	3/6/2024	<9 µg/L	9 µg/L	Not Detected
NMeFOSAA	3/6/2024	<0.006 µg/L	0.006 µg/L	Not Detected
PFUnA	3/6/2024	<0.002 µg/L	0.002 µg/L	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 CLEWISTON, CITY OF.

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 FL5260053 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Florida Drinking Water Authority

Florida Department of Environmental Protection — Drinking Water Program is the primacy agency that licenses and inspects CLEWISTON, CITY OF under EPA-delegated authority.

Open FL regulator portal

Source: Florida Department of Environmental Protection — Drinking Water Program

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	TTHM	MR	9	SDWIS / FL5260053 / 2950
2024	Total Haloacetic Acids (HAA5)	MR	9	SDWIS / FL5260053 / 2456
2016	E. COLI	MR	3	SDWIS / FL5260053 / 3014
2016	Public Notice	Other	3	SDWIS / FL5260053 / 7500
2010	Stage 2 Disinfectants and Disinfection Byproducts Rule	MR	4	SDWIS / FL5260053 / 0600
2006	Coliform (TCR)	MR	4	SDWIS / FL5260053 / 3100
2006	Interim Enhanced Surface Water Treatment Rule	MR	2	SDWIS / FL5260053 / 0300
2006	Interim Enhanced Surface Water Treatment Rule	TT	2	SDWIS / FL5260053 / 0300
1993	Lead and Copper Rule	MR	16	SDWIS / FL5260053 / 5000
1993	Lead and Copper Rule	Other	16	SDWIS / FL5260053 / 5000
1993	Lead and Copper Rule	TT	12	SDWIS / FL5260053 / 5000

How CLEWISTON, CITY OF Compares

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

Metric	CLEWISTON, CITY OF	Florida avg	Federal benchmark
Total violations	86	36.2	SDWA compliance — any non-zero count is a recorded breach
Health-based violations	14	4.8	Indicates a contaminant exceeded a federal MCL
PFAS detection	None	54.2%	EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served	9,600	4,395	Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 5,093 regulated public water systems in Florida.

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
Nitrate (as N)	10 mg/L	Acute health risk for infants

Frequently Asked Questions

Is CLEWISTON, CITY OF water safe to drink? ▼

CLEWISTON, CITY OF (PWS ID: FL5260053) has 86 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 9,600 people using Surface Water sources.

How many people does CLEWISTON, CITY OF serve? ▼

CLEWISTON, CITY OF serves 9,600 people in CLEWISTON, Florida. It is a Local-owned system using Surface Water water sources with 3,840 service connections.

What type of violations does CLEWISTON, CITY OF have? ▼

CLEWISTON, CITY OF has 86 total violations: 14 health-based violations (MCL exceedances or treatment failures), 47 monitoring/reporting violations, and 14 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in CLEWISTON, CITY OF water? ▼

No. CLEWISTON, CITY OF was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

What water source does CLEWISTON, CITY OF use? ▼

CLEWISTON, CITY OF 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.

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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.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial