Orangewood Water System

PFAS monitoring results for a public water system in Florida

FL6511311UCMR 5EPA monitoring data
27.1Highest PFOA result, ppt
80.8Highest PFOS result, ppt
1.431Highest Hazard Index
300Results
PWSID
FL6511311
State
Florida
System type
community water system (CWS)
Population served
6,464
City
Holiday
Counties
Pasco County
Primary source water
groundwater
UCMR 5 sampling
2023-01-09 to 2023-09-05 · 5 entry point(s) · water types: GW
Service-area boundary
EPA-modeled (Random Forest) — approximate: estimated by EPA with a statistical model, not a surveyed service area

PFOS ≥ 3 × its limit highest single result
PFOS ≥ 3 × its limit worst entry-point average

These are monitoring results collected under EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) at entry points, where treated water enters the distribution system; they are not tap-water samples. They are not compliance determinations: compliance with EPA's 2024 PFAS limits is judged on running annual averages of compliance monitoring, required from 2029, so a single UCMR 5 result at or above a limit is not a violation. “< MRL” means the compound was not quantified at EPA's minimum reporting level; it does not mean zero.

Compared with EPA's 2024 values

Highest single resultWorst entry-point average*Limit
PFOA (ppt)27.126.454
PFOS (ppt)80.878.054
Hazard Index1.4311.3451.0†

“<MRL” = every result for the compound was below its reporting limit. * Mean of all samples at each entry point with non-detects = 0 (EPA compliance convention; the Hazard Index also uses non-detects = 0); a screening comparison, not a formal running annual average. † Rescission proposed May 2026. PFOA/PFOS MCL 4 ppt (2024 NPDWR, in effect). PFHxS, PFNA, HFPO-DA (10 ppt each) and the Hazard Index (1.0) are 2024 NPDWR values; EPA proposed rescinding them on 18 May 2026 (comment period closed 20 Jul 2026).

No Florida PFAS drinking-water standard in effect or proposed as of 2026-10-17: No state PFAS drinking-water MCL. Ch. 2022-203 Laws of Fla. (s. 376.91) concerns contaminated-site cleanup target levels, not drinking water.

Sampling history

Sampled 2023-01-09 to 2023-09-05 · 5 entry point(s) · water types: GW · 12 sampling visits. PFAS in ppt (ng/L).

DateEntry pointEventPFOAPFOSHIOther detections
2023-01-09BEUNA VISTA WELL #3 (GW)SE11444.60.638PFBA 15.3, PFHpA 6.9, PFHxA 10.3, PFPeA 11.3
2023-01-09BUENA VISTA WELL #1 (GW)SE115.172.20.691PFBA 13.9, PFHpA 3.1, PFHxA 6.5, PFPeA 9.7
2023-01-09BUENA VISTA WELL #2 (GW)SE125.875.71.298PFBA 20.2, PFHpA 6.8, PFHxA 11, PFPeA 16.6
2023-01-09ORANGEWOOD WELL 1 (GW)SE1n/an/an/anone
2023-01-09ORANGEWOOD WELL 2 (GW)SE11567.51.431PFBA 16.1, PFHpA 3.3, PFHxA 6.3, PFPeA 9.6
2023-02-28ORANGEWOOD WELL 1 (GW)SE118.480.80.961PFBA 17.4, PFHpA 3.4, PFHxA 5.6, PFPeA 9.6
2023-07-12BEUNA VISTA WELL #3 (GW)SE213.135.20.596PFBA 16, PFHpA 7.6, PFHxA 12.3, PFPeA 11.5
2023-07-12BUENA VISTA WELL #1 (GW)SE215.754.60.72PFBA 12.3, PFHpA 4.3, PFHxA 7.9, PFPeA 10.4
2023-07-12BUENA VISTA WELL #2 (GW)SE2n/an/a0none
2023-07-12ORANGEWOOD WELL 1 (GW)SE218.375.30.871PFBA 16.8, PFHpA 3.4, PFHxA 6.3, PFPeA 10.1
2023-07-12ORANGEWOOD WELL 2 (GW)SE213.660.81.259PFBA 14.7, PFHxA 4.1, PFPeA 6.7
2023-09-05BUENA VISTA WELL #2 (GW)SE227.175.81.118PFBA 20.7, PFHpA 6.2, PFHxA 9.9, PFPeA 15.4

“<4” = not detected at the reporting limit shown; “n/a” = not analyzed in that sample. Highlighted = at or above the 4 ppt MCL. HI computed per sample with non-detects as 0. Other detections lists every other quantified compound (lithium in µg/L).

All results by entry point

300 results. Each column is one sampling visit (date and UCMR 5 sample event). A number is a measured concentration; “< 4” = below the minimum reporting level shown; “–” = not analyzed in that visit. PFAS in ppt (ng/L); lithium in µg/L.

BEUNA VISTA WELL #3 facility 6 · sample point 65113116 · groundwater

CompoundMRL2023-01-09
SE1
2023-07-12
SE2
PFBA5 ppt15.316
PFBS3 ppt16.312.8
PFHpA3 ppt6.97.6
PFHxA3 ppt10.312.3
PFHxS3 ppt6.35.9
PFOA4 ppt1413.1
PFOS4 ppt44.635.2
PFPeA3 ppt11.311.5
11Cl-PF3OUdS5 ppt< 5< 5
4:2 FTS3 ppt< 3< 3
6:2 FTS5 ppt< 5< 5
8:2 FTS5 ppt< 5< 5
9Cl-PF3ONS2 ppt< 2< 2
ADONA3 ppt< 3< 3
HFPO-DA5 ppt< 5< 5
NEtFOSAA5 ppt< 5< 5
NFDHA20 ppt< 20< 20
NMeFOSAA6 ppt< 6< 6
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

BUENA VISTA WELL #1 facility 4 · sample point 65113114 · groundwater

CompoundMRL2023-01-09
SE1
2023-07-12
SE2
PFBA5 ppt13.912.3
PFBS3 ppt21.919.3
PFHpA3 ppt3.14.3
PFHxA3 ppt6.57.9
PFHxS3 ppt6.87.1
PFOA4 ppt15.115.7
PFOS4 ppt72.254.6
PFPeA3 ppt9.710.4
11Cl-PF3OUdS5 ppt< 5< 5
4:2 FTS3 ppt< 3< 3
6:2 FTS5 ppt< 5< 5
8:2 FTS5 ppt< 5< 5
9Cl-PF3ONS2 ppt< 2< 2
ADONA3 ppt< 3< 3
HFPO-DA5 ppt< 5< 5
NEtFOSAA5 ppt< 5< 5
NFDHA20 ppt< 20< 20
NMeFOSAA6 ppt< 6< 6
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

BUENA VISTA WELL #2 facility 5 · sample point 65113115 · groundwater

CompoundMRL2023-01-09
SE1
2023-07-12
SE2
2023-09-05
SE2
PFBA5 ppt20.2–20.7
PFBS3 ppt16.4–16.4
PFHpA3 ppt6.8–6.2
PFHxA3 ppt11–9.9
PFHxS3 ppt12.9–11.1
PFOA4 ppt25.8–27.1
PFOS4 ppt75.7–75.8
PFPeA3 ppt16.6–15.4
11Cl-PF3OUdS5 ppt< 5< 5–
4:2 FTS3 ppt< 3< 3–
6:2 FTS5 ppt< 5< 5–
8:2 FTS5 ppt< 5< 5–
9Cl-PF3ONS2 ppt< 2< 2–
ADONA3 ppt< 3< 3–
HFPO-DA5 ppt< 5< 5–
NEtFOSAA5 ppt< 5< 5–
NFDHA20 ppt< 20< 20–
NMeFOSAA6 ppt< 6< 6–
PFDA3 ppt< 3< 3–
PFDoA3 ppt< 3< 3–
PFEESA3 ppt< 3< 3–
PFHpS3 ppt< 3< 3–
PFMBA3 ppt< 3< 3–
PFMPA4 ppt< 4< 4–
PFNA4 ppt< 4< 4–
PFPeS4 ppt< 4< 4–
PFTA8 ppt< 8< 8–
PFTrDA7 ppt< 7< 7–
PFUnA2 ppt< 2< 2–
lithium9 µg/L< 9< 9–

ORANGEWOOD WELL 1 facility 1 · sample point 65113111 · groundwater

CompoundMRL2023-01-09
SE1
2023-02-28
SE1
2023-07-12
SE2
PFBA5 ppt–17.416.8
PFBS3 ppt–22.721.3
PFHpA3 ppt–3.43.4
PFHxA3 ppt–5.66.3
PFHxS3 ppt–9.58.6
PFOA4 ppt–18.418.3
PFOS4 ppt–80.875.3
PFPeA3 ppt–9.610.1
11Cl-PF3OUdS5 ppt–< 5< 5
4:2 FTS3 ppt–< 3< 3
6:2 FTS5 ppt–< 5< 5
8:2 FTS5 ppt–< 5< 5
9Cl-PF3ONS2 ppt–< 2< 2
ADONA3 ppt–< 3< 3
HFPO-DA5 ppt–< 5< 5
NEtFOSAA5 ppt< 5–< 5
NFDHA20 ppt–< 20< 20
NMeFOSAA6 ppt< 6–< 6
PFDA3 ppt–< 3< 3
PFDoA3 ppt–< 3< 3
PFEESA3 ppt–< 3< 3
PFHpS3 ppt–< 3< 3
PFMBA3 ppt–< 3< 3
PFMPA4 ppt–< 4< 4
PFNA4 ppt–< 4< 4
PFPeS4 ppt–< 4< 4
PFTA8 ppt< 8–< 8
PFTrDA7 ppt< 7–< 7
PFUnA2 ppt–< 2< 2
lithium9 µg/L< 9–< 9

ORANGEWOOD WELL 2 facility 2 · sample point 65113112 · groundwater

CompoundMRL2023-01-09
SE1
2023-07-12
SE2
PFBA5 ppt16.114.7
PFBS3 ppt21.218.4
PFHpA3 ppt3.3< 3
PFHxA3 ppt6.34.1
PFHxS3 ppt87.1
PFNA4 ppt6.25.4
PFOA4 ppt1513.6
PFOS4 ppt67.560.8
PFPeA3 ppt9.66.7
11Cl-PF3OUdS5 ppt< 5< 5
4:2 FTS3 ppt< 3< 3
6:2 FTS5 ppt< 5< 5
8:2 FTS5 ppt< 5< 5
9Cl-PF3ONS2 ppt< 2< 2
ADONA3 ppt< 3< 3
HFPO-DA5 ppt< 5< 5
NEtFOSAA5 ppt< 5< 5
NFDHA20 ppt< 20< 20
NMeFOSAA6 ppt< 6< 6
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Statistics by compound

CompoundResultsDetectedHighest (date)Mean boundsKM medianP75P90P95
PFBA10100%20.7
2023-09-05
16.34–16.341617.420.220.7
PFBS10100%22.7
2023-02-28
18.67–18.6718.421.321.922.7
PFHxA10100%12.3
2023-07-12
8.02–8.026.510.31112.3
PFHxS10100%12.9
2023-01-09
8.33–8.337.19.511.112.9
PFOA10100%27.1
2023-09-05
17.61–17.6115.118.425.827.1
PFOS10100%80.8
2023-02-28
64.25–64.2567.575.775.880.8
PFPeA10100%16.6
2023-01-09
11.09–11.0910.111.515.416.6
PFHpA1090%7.6
2023-07-12
4.5–4.83.46.86.97.6
PFNA1020%6.2
2023-01-09
1.16–4.36<MRL<MRL5.46.2

Never detected (21): 11Cl-PF3OUdS, 4:2 FTS, 6:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFDA, PFDoA, PFEESA, PFHpS, PFMBA, PFMPA, PFPeS, PFTA, PFTrDA, PFUnA, lithium.

Left-censored Kaplan–Meier statistics (Helsel 2005; Helsel & Lee 2006, NADA for R). Units: ppt; lithium µg/L. Each compound has one reporting limit, so the Kaplan–Meier mean equals the upper mean bound (non-detects at the MRL); the lower bound sets non-detects to 0. “<MRL” = the percentile falls below the reporting limit and cannot be estimated. These describe this system's UCMR 5 samples, not population estimates.

Sources

  • EPA UCMR 5 occurrence data text files (UCMR5_All.txt; samples 2023-01-03 to 2026-06-09; data summary dated Jul 2026)
  • EPA SDWIS via ECHO SDWA downloads, quarter 2026Q3
  • EPA Public Water System Service Areas v3 (Mar 2026)
  • US Census Bureau cartographic boundary counties 1:500k, 2024
  • EPA/USGS NHDPlus V2 (medium resolution) flowlines, Strahler order 2+

Data build 77d99d3b80c8 · 2026-10-18T04:10Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.