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Community Water System · PWS FL4504903

Seminole Improvement District

Westlake, Florida 33414 - drinking water served from groundwater sources to 4,993 people, tracked in EPA SDWIS and UCMR5.

4,993
People served
370
EPA violations
0
Health-based
8 PFAS
UCMR5 result

The verdict

EPA records 370 drinking-water violations at Seminole Improvement District - above the Florida per-system average, and UCMR5 testing detected 8 PFAS compounds.

370
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
4,993
People served by this system
8
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Seminole Improvement District

Seminole Improvement District is a private-owned community water system that delivers drinking water to 4,993 residents in Westlake, Florida (Palm Beach County) through 3,850 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 370 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 369 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 7 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 8 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 11 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. Statewide, 218 of 402 UCMR5-tested systems have reported PFAS detections (54.2%).

Seminole Improvement District's 370 violations sit above the Florida 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

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

Population Served
4,993
Total Violations
370
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
3,850
County
Palm Beach
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
369
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 7 2018
BHC-GAMMA MR 6 2005
Di(2-ethylhexyl) phthalate MR 6 2005
trans-1,2-Dichloroethylene MR 6 2005
Carbon tetrachloride MR 6 2005
Endothall MR 6 2005
Endrin MR 6 2005
Hexachlorocyclopentadiene MR 6 2005
Pentachlorophenol MR 6 2005
Tetrachloroethylene MR 6 2005
Benzene MR 6 2005
Simazine MR 6 2005
Di(2-ethylhexyl) adipate MR 6 2005
LASSO MR 6 2005
p-Dichlorobenzene MR 6 2005
Carbofuran MR 6 2005
2,4-D MR 6 2005
1,1-Dichloroethylene MR 6 2005
1,1,1-Trichloroethane MR 6 2005
Styrene MR 6 2005
Dalapon MR 6 2005
Heptachlor MR 6 2005
1,2-DIBROMO-3-CHLOROPROPANE MR 6 2005
Picloram MR 6 2005
Xylenes, Total MR 6 2005
Trichloroethylene MR 6 2005
1,1,2-Trichloroethane MR 6 2005
Diquat MR 6 2005
Atrazine MR 6 2005
DICHLOROMETHANE MR 6 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 11 of 58 samples detected PFAS.

Contaminant Date Result MRL Status
PFBA 6/7/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 6/7/2023 <6.00 ppt 6.00 ppt Not Detected
HFPO-DA 6/7/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 6/7/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 6/7/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 6/7/2023 <4.00 ppt 4.00 ppt Not Detected
NEtFOSAA 6/7/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 6/7/2023 <7.00 ppt 7.00 ppt Not Detected
PFTA 6/7/2023 <8.00 ppt 8.00 ppt Not Detected
ADONA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeS 6/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpS 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 6/7/2023 3.90 ppt 3.00 ppt Detected
PFOS 6/7/2023 6.90 ppt 4.00 ppt Detected
PFBS 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 6/7/2023 <2.00 ppt 2.00 ppt Not Detected
PFNA 6/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 6/7/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/7/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxA 6/7/2023 3.10 ppt 3.00 ppt Detected
PFUnA 6/7/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 6/7/2023 <5.00 ppt 5.00 ppt Not Detected
NFDHA 6/7/2023 <20.00 ppt 20.00 ppt Not Detected
NMeFOSAA 12/6/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 12/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 12/6/2023 <7.00 ppt 7.00 ppt Not Detected
PFTA 12/6/2023 <8.00 ppt 8.00 ppt Not Detected
PFHpS 12/6/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 12/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFBS 12/6/2023 4.80 ppt 3.00 ppt Detected
PFPeS 12/6/2023 <4.00 ppt 4.00 ppt Not Detected
PFEESA 12/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 12/6/2023 <3.00 ppt 3.00 ppt Not Detected
PFPeA 12/6/2023 6.60 ppt 3.00 ppt Detected
PFMPA 12/6/2023 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 12/6/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 12/6/2023 <3.00 ppt 3.00 ppt Not Detected
NFDHA 12/6/2023 <20.00 ppt 20.00 ppt Not Detected
PFBA 12/6/2023 5.50 ppt 5.00 ppt Detected
PFHpA 12/6/2023 3.40 ppt 3.00 ppt Detected
ADONA 12/6/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 12/6/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 12/6/2023 <5.00 ppt 5.00 ppt Not Detected
PFUnA 12/6/2023 <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 Seminole Improvement District.

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 FL4504903 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 Seminole Improvement District 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
2018 Lead and Copper Rule MR 7 SDWIS / FL4504903 / 5000
2016 Total Haloacetic Acids (HAA5) MR 1 SDWIS / FL4504903 / 2456
2016 TTHM MR 1 SDWIS / FL4504903 / 2950
2005 BHC-GAMMA MR 6 SDWIS / FL4504903 / 2010
2005 Di(2-ethylhexyl) phthalate MR 6 SDWIS / FL4504903 / 2039
2005 trans-1,2-Dichloroethylene MR 6 SDWIS / FL4504903 / 2979
2005 Carbon tetrachloride MR 6 SDWIS / FL4504903 / 2982
2005 Endothall MR 6 SDWIS / FL4504903 / 2033
2005 Endrin MR 6 SDWIS / FL4504903 / 2005
2005 Hexachlorocyclopentadiene MR 6 SDWIS / FL4504903 / 2042
2005 Pentachlorophenol MR 6 SDWIS / FL4504903 / 2326
2005 Tetrachloroethylene MR 6 SDWIS / FL4504903 / 2987
2005 Benzene MR 6 SDWIS / FL4504903 / 2990
2005 Simazine MR 6 SDWIS / FL4504903 / 2037
2005 Di(2-ethylhexyl) adipate MR 6 SDWIS / FL4504903 / 2035

How Seminole Improvement District Compares

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

Metric Seminole Improvement District Florida avg Federal benchmark
Total violations 370 36.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 4.8 Indicates a contaminant exceeded a federal MCL
PFAS detection 8 compounds 54.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 4,993 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 (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 Seminole Improvement District water safe to drink? ▼
Seminole Improvement District (PWS ID: FL4504903) has 370 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 8 PFAS compounds found. This system serves 4,993 people using Groundwater sources.
How many people does Seminole Improvement District serve? ▼
Seminole Improvement District serves 4,993 people in Westlake, Florida. It is a Private-owned system using Groundwater water sources with 3,850 service connections.
What type of violations does Seminole Improvement District have? ▼
Seminole Improvement District has 370 total violations: 0 health-based violations (MCL exceedances or treatment failures), 369 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Seminole Improvement District water? ▼
Yes. UCMR5 testing detected 8 PFAS compounds in Seminole Improvement District's water supply: PFPeA, PFOS, PFHxA, PFBS, PFBA, and others. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does Seminole Improvement District use? ▼
Seminole Improvement District 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.