Southwood

PFAS monitoring results for a public water system in Washington

WA5382844UCMR 5EPA monitoring data
6.2Highest PFOA result, ppt
8.9Highest PFOS result, ppt
0.003Highest Hazard Index
1,500Results
PWSID
WA5382844
State
Washington
System type
community water system (CWS)
Population served
64,155
City
Tacoma
Counties
Pierce County
Primary source water
surface water (purchased)
UCMR 5 sampling
2024-04-01 to 2025-10-01 · 27 entry point(s) · water types: GW;SW
Service-area boundary
authoritative

PFOS 1–3 × its limit highest single result
PFOS 1–3 × 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.

Water purchased from

  • Firgrove Mutual Inc (WA5325200)
    Seller's highest results: PFOA 4.4 ppt · PFOS 8.6 ppt · HI 0.003 · detected: PFBS;PFOA;PFOS
  • Tacoma Water Division City Of (WA5386800)
    Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0.51 · detected: PFBS;PFHxS
  • Lakewood Water District (WA5345550)
    Seller's highest results: PFOA <MRL · PFOS 5.9 ppt · HI 0.562 · detected: PFBA;PFBS;PFHxS;PFOS;PFPeA

Seller results are the seller's own entry-point samples, not measurements of this system's water. This system's own samples (below) may reflect purchased water, its own sources, or both.

Compared with EPA's 2024 values

Highest single resultWorst entry-point average*Limit
PFOA (ppt)6.26.24
PFOS (ppt)8.98.94
Hazard Index0.0030.0031.0†

“<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).

Compared with Washington standards

Highest single resultWorst entry-point average*Washington
PFOA (ppt)6.26.24
PFOS (ppt)8.98.94
PFNA (ppt)0010
PFHxS (ppt)0010
HFPO-DA (GenX) (ppt)0010

Sum standards add the listed compounds within each sample (non-detects = 0). State compliance is normally judged on averages over time; these are screening comparisons.

Sampling history

Sampled 2024-04-01 to 2025-10-01 · 27 entry point(s) · water types: GW;SW · 50 sampling visits. PFAS in ppt (ng/L).

DateEntry pointEventPFOAPFOSHIOther detections
2024-04-01185th Well #1 (GW)SE1<440.003none
2024-04-01Blue Horizon Well #2 (GW)SE1<4<40none
2024-04-01Blue Horizon Well #3 (GW)SE1<4<40none
2024-04-01Daybreak Well #4 (GW)SE1<4<40none
2024-04-01Fir Meadows Well #4 (GW)SE1<4<40none
2024-04-01Fir Meadows Wellfield (GW)SE1<4<40none
2024-04-01Lakewood Intertie (GW)SE1<4<40none
2024-04-01Silver Creek Well #1 (GW)SE1<4<40none
2024-04-01Tannenbaum Wellfield (GW)SE1<4<40.002none
2024-04-02Behm Well #3 (GW)SE1<4<40none
2024-04-02Bethel Ridge Well #1 (GW)SE16.28.90.003PFHxA 4.6, PFPeA 4
2024-04-02Chateau Woods Wellfield (GW)SE1<4<40none
2024-04-02Eastwood Park Well #1 (GW)SE1<4<40none
2024-04-02Lauradel Well #2 (GW)SE1<4<40none
2024-04-02Martin WellL #1 (GW)SE1<4<40none
2024-04-02Morrey Glen Wellfield (GW)SE14.250.002none
2024-04-02Quiet Village 2 Well #1 (GW)SE1<4<40none
2024-04-02Shining Mountain Well #1 (GW)SE1<4<40none
2024-04-02Southwood 1 Well #1 (GW)SE1<4<40none
2024-04-02Southwood Well #5 (GW)SE1<4<40none
2024-04-02Tacoma Intertie (SW)SE1<4<40none
2024-04-03Country Park 2 Well #1 (GW)SE1<4<40none
2024-04-03Oak Hill Well #1 (GW)SE14.24.40.003none
2024-04-03Thrift Well #1 (GW)SE1<4<40none
2024-04-03Thrift Well #2 (GW)SE1<4<40none
2024-07-15Tacoma Intertie (SW)SE2<4<40none
2024-10-15Lauradel Well #2 (GW)SE2<4<40none
2024-10-16185th Well #1 (GW)SE2<4<40.003none
2024-10-16Country Park 2 Well #1 (GW)SE2<4<40none
2024-10-16Lakewood Intertie (GW)SE2<4<40none
2024-10-16Oak Hill Well #1 (GW)SE2<44.50.003none
2024-10-16Tacoma Intertie (SW)SE3<4<40none
2024-10-21Behm Well #2 (GW)SE1<4<40none
2024-10-21Behm Well #3 (GW)SE2<4<40none
2024-10-21Blue Horizon Well #3 (GW)SE2<4<40none
2024-10-21Chateau Woods Wellfield (GW)SE2<4<40none
2024-10-21Daybreak Well #4 (GW)SE2<4<40none
2024-10-21Fir Meadows Well #4 (GW)SE2<4<40PFHxA 13, PFPeA 31
2024-10-21Fir Meadows Wellfield (GW)SE2<4<40PFBA 14, PFHxA 48, PFPeA 110
2024-10-21Martin WellL #1 (GW)SE2<4<40none
2024-10-21Silver Creek Well #1 (GW)SE2<4<40none
2024-10-21Tannenbaum Wellfield (GW)SE2<4<40.002none
2024-10-21Thrift Well #1 (GW)SE2<4<40none
2024-10-21Thrift Well #2 (GW)SE2<4<40none
2024-10-22Eastwood Park Well #1 (GW)SE2<4<40none
2024-10-22Morrey Glen Wellfield (GW)SE2<460.002none
2024-10-22Quiet Village 2 Well #1 (GW)SE2<4<40none
2024-10-22Shining Mountain Well #1 (GW)SE2<4<40none
2024-10-22Southwood 1 Well #1 (GW)SE2<4<40none
2025-10-01Beverly Park Well #4 (GW)SE2<4<40none

“<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

1500 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.

185th Well #1 facility AEF248 · sample point S30 · groundwater

CompoundMRL2024-04-01
SE1
2024-10-16
SE2
PFBS3 ppt6.76.2
PFOS4 ppt4< 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
PFBA5 ppt< 5< 5
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Behm Well #2 facility BJN455 · sample point S33 · groundwater

CompoundMRL2024-10-21
SE1
11Cl-PF3OUdS5 ppt< 5
4:2 FTS3 ppt< 3
6:2 FTS5 ppt< 5
8:2 FTS5 ppt< 5
9Cl-PF3ONS2 ppt< 2
ADONA3 ppt< 3
HFPO-DA5 ppt< 5
NEtFOSAA5 ppt< 5
NFDHA20 ppt< 20
NMeFOSAA6 ppt< 6
PFBA5 ppt< 5
PFBS3 ppt< 3
PFDA3 ppt< 3
PFDoA3 ppt< 3
PFEESA3 ppt< 3
PFHpA3 ppt< 3
PFHpS3 ppt< 3
PFHxA3 ppt< 3
PFHxS3 ppt< 3
PFMBA3 ppt< 3
PFMPA4 ppt< 4
PFNA4 ppt< 4
PFOA4 ppt< 4
PFOS4 ppt< 4
PFPeA3 ppt< 3
PFPeS4 ppt< 4
PFTA8 ppt< 8
PFTrDA7 ppt< 7
PFUnA2 ppt< 2
lithium9 µg/L< 9

Behm Well #3 facility AHL762 · sample point S46 · groundwater

CompoundMRL2024-04-02
SE1
2024-10-21
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Bethel Ridge Well #1 facility ABA692 · sample point S02 · groundwater

CompoundMRL2024-04-02
SE1
PFBS3 ppt6.2
PFHxA3 ppt4.6
PFOA4 ppt6.2
PFOS4 ppt8.9
PFPeA3 ppt4
11Cl-PF3OUdS5 ppt< 5
4:2 FTS3 ppt< 3
6:2 FTS5 ppt< 5
8:2 FTS5 ppt< 5
9Cl-PF3ONS2 ppt< 2
ADONA3 ppt< 3
HFPO-DA5 ppt< 5
NEtFOSAA5 ppt< 5
NFDHA20 ppt< 20
NMeFOSAA6 ppt< 6
PFBA5 ppt< 5
PFDA3 ppt< 3
PFDoA3 ppt< 3
PFEESA3 ppt< 3
PFHpA3 ppt< 3
PFHpS3 ppt< 3
PFHxS3 ppt< 3
PFMBA3 ppt< 3
PFMPA4 ppt< 4
PFNA4 ppt< 4
PFPeS4 ppt< 4
PFTA8 ppt< 8
PFTrDA7 ppt< 7
PFUnA2 ppt< 2
lithium9 µg/L< 9

Beverly Park Well #4 facility BHJ050 · sample point S54 · groundwater

CompoundMRL2025-10-01
SE2
11Cl-PF3OUdS5 ppt< 5
4:2 FTS3 ppt< 3
6:2 FTS5 ppt< 5
8:2 FTS5 ppt< 5
9Cl-PF3ONS2 ppt< 2
ADONA3 ppt< 3
HFPO-DA5 ppt< 5
NEtFOSAA5 ppt< 5
NFDHA20 ppt< 20
NMeFOSAA6 ppt< 6
PFBA5 ppt< 5
PFBS3 ppt< 3
PFDA3 ppt< 3
PFDoA3 ppt< 3
PFEESA3 ppt< 3
PFHpA3 ppt< 3
PFHpS3 ppt< 3
PFHxA3 ppt< 3
PFHxS3 ppt< 3
PFMBA3 ppt< 3
PFMPA4 ppt< 4
PFNA4 ppt< 4
PFOA4 ppt< 4
PFOS4 ppt< 4
PFPeA3 ppt< 3
PFPeS4 ppt< 4
PFTA8 ppt< 8
PFTrDA7 ppt< 7
PFUnA2 ppt< 2
lithium9 µg/L< 9

Blue Horizon Well #2 facility ACV508 · sample point S58 · groundwater

CompoundMRL2024-04-01
SE1
11Cl-PF3OUdS5 ppt< 5
4:2 FTS3 ppt< 3
6:2 FTS5 ppt< 5
8:2 FTS5 ppt< 5
9Cl-PF3ONS2 ppt< 2
ADONA3 ppt< 3
HFPO-DA5 ppt< 5
NEtFOSAA5 ppt< 5
NFDHA20 ppt< 20
NMeFOSAA6 ppt< 6
PFBA5 ppt< 5
PFBS3 ppt< 3
PFDA3 ppt< 3
PFDoA3 ppt< 3
PFEESA3 ppt< 3
PFHpA3 ppt< 3
PFHpS3 ppt< 3
PFHxA3 ppt< 3
PFHxS3 ppt< 3
PFMBA3 ppt< 3
PFMPA4 ppt< 4
PFNA4 ppt< 4
PFOA4 ppt< 4
PFOS4 ppt< 4
PFPeA3 ppt< 3
PFPeS4 ppt< 4
PFTA8 ppt< 8
PFTrDA7 ppt< 7
PFUnA2 ppt< 2
lithium9 µg/L< 9

Blue Horizon Well #3 facility ACV501 · sample point S59 · groundwater

CompoundMRL2024-04-01
SE1
2024-10-21
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Chateau Woods Wellfield facility WFS51S52 · sample point S50 · groundwater

CompoundMRL2024-04-02
SE1
2024-10-21
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Country Park 2 Well #1 facility BJN453 · sample point S18 · groundwater

CompoundMRL2024-04-03
SE1
2024-10-16
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Daybreak Well #4 facility BIQ276 · sample point S60 · groundwater

CompoundMRL2024-04-01
SE1
2024-10-21
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Eastwood Park Well #1 facility ACV544 · sample point S48 · groundwater

CompoundMRL2024-04-02
SE1
2024-10-22
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Fir Meadows Well #4 facility BJN452 · sample point S27 · groundwater

CompoundMRL2024-04-01
SE1
2024-10-21
SE2
PFHxA3 ppt< 313
PFPeA3 ppt< 331
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Fir Meadows Wellfield facility WFS21S22 · sample point S12 · groundwater

CompoundMRL2024-04-01
SE1
2024-10-21
SE2
PFBA5 ppt< 514
PFHxA3 ppt< 348
PFPeA3 ppt< 3110
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
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Lakewood Intertie facility 45550 · sample point S56 · groundwater

CompoundMRL2024-04-01
SE1
2024-10-16
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Lauradel Well #2 facility ABE949 · sample point S20 · groundwater

CompoundMRL2024-04-02
SE1
2024-10-15
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Martin WellL #1 facility AEF224 · sample point S32 · groundwater

CompoundMRL2024-04-02
SE1
2024-10-21
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Morrey Glen Wellfield facility WFS23S24 · sample point S14 · groundwater

CompoundMRL2024-04-02
SE1
2024-10-22
SE2
PFBS3 ppt4.84.9
PFOA4 ppt4.2< 4
PFOS4 ppt56
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
PFBA5 ppt< 5< 5
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Oak Hill Well #1 facility ABE941 · sample point S15 · groundwater

CompoundMRL2024-04-03
SE1
2024-10-16
SE2
PFBS3 ppt5.86.1
PFOA4 ppt4.2< 4
PFOS4 ppt4.44.5
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
PFBA5 ppt< 5< 5
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Quiet Village 2 Well #1 facility ABE943 · sample point S11 · groundwater

CompoundMRL2024-04-02
SE1
2024-10-22
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Shining Mountain Well #1 facility ACW500 · sample point S40 · groundwater

CompoundMRL2024-04-02
SE1
2024-10-22
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Silver Creek Well #1 facility AKJ211 · sample point S45 · groundwater

CompoundMRL2024-04-01
SE1
2024-10-21
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Southwood 1 Well #1 facility ABA677 · sample point S01 · groundwater

CompoundMRL2024-04-02
SE1
2024-10-22
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Southwood Well #5 facility BKJ700 · sample point S53 · groundwater

CompoundMRL2024-04-02
SE1
11Cl-PF3OUdS5 ppt< 5
4:2 FTS3 ppt< 3
6:2 FTS5 ppt< 5
8:2 FTS5 ppt< 5
9Cl-PF3ONS2 ppt< 2
ADONA3 ppt< 3
HFPO-DA5 ppt< 5
NEtFOSAA5 ppt< 5
NFDHA20 ppt< 20
NMeFOSAA6 ppt< 6
PFBA5 ppt< 5
PFBS3 ppt< 3
PFDA3 ppt< 3
PFDoA3 ppt< 3
PFEESA3 ppt< 3
PFHpA3 ppt< 3
PFHpS3 ppt< 3
PFHxA3 ppt< 3
PFHxS3 ppt< 3
PFMBA3 ppt< 3
PFMPA4 ppt< 4
PFNA4 ppt< 4
PFOA4 ppt< 4
PFOS4 ppt< 4
PFPeA3 ppt< 3
PFPeS4 ppt< 4
PFTA8 ppt< 8
PFTrDA7 ppt< 7
PFUnA2 ppt< 2
lithium9 µg/L< 9

Tacoma Intertie facility 29687 · sample point EP001 · surface water

CompoundMRL2024-04-02
SE1
2024-07-15
SE2
2024-10-16
SE3
11Cl-PF3OUdS5 ppt< 5< 5< 5
4:2 FTS3 ppt< 3< 3< 3
6:2 FTS5 ppt< 5< 5< 5
8:2 FTS5 ppt< 5< 5< 5
9Cl-PF3ONS2 ppt< 2< 2< 2
ADONA3 ppt< 3< 3< 3
HFPO-DA5 ppt< 5< 5< 5
NEtFOSAA5 ppt< 5< 5< 5
NFDHA20 ppt< 20< 20< 20
NMeFOSAA6 ppt< 6< 6< 6
PFBA5 ppt< 5< 5< 5
PFBS3 ppt< 3< 3< 3
PFDA3 ppt< 3< 3< 3
PFDoA3 ppt< 3< 3< 3
PFEESA3 ppt< 3< 3< 3
PFHpA3 ppt< 3< 3< 3
PFHpS3 ppt< 3< 3< 3
PFHxA3 ppt< 3< 3< 3
PFHxS3 ppt< 3< 3< 3
PFMBA3 ppt< 3< 3< 3
PFMPA4 ppt< 4< 4< 4
PFNA4 ppt< 4< 4< 4
PFOA4 ppt< 4< 4< 4
PFOS4 ppt< 4< 4< 4
PFPeA3 ppt< 3< 3< 3
PFPeS4 ppt< 4< 4< 4
PFTA8 ppt< 8< 8< 8
PFTrDA7 ppt< 7< 7< 7
PFUnA2 ppt< 2< 2< 2
lithium9 µg/L< 9< 9< 9

Tannenbaum Wellfield facility WFS36S37 · sample point S34 · groundwater

CompoundMRL2024-04-01
SE1
2024-10-21
SE2
PFBS3 ppt4.64.2
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
PFBA5 ppt< 5< 5
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Thrift Well #1 facility ABA679 · sample point S17 · groundwater

CompoundMRL2024-04-03
SE1
2024-10-21
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
PFPeS4 ppt< 4< 4
PFTA8 ppt< 8< 8
PFTrDA7 ppt< 7< 7
PFUnA2 ppt< 2< 2
lithium9 µg/L< 9< 9

Thrift Well #2 facility ABA680 · sample point S26 · groundwater

CompoundMRL2024-04-03
SE1
2024-10-21
SE2
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
PFBA5 ppt< 5< 5
PFBS3 ppt< 3< 3
PFDA3 ppt< 3< 3
PFDoA3 ppt< 3< 3
PFEESA3 ppt< 3< 3
PFHpA3 ppt< 3< 3
PFHpS3 ppt< 3< 3
PFHxA3 ppt< 3< 3
PFHxS3 ppt< 3< 3
PFMBA3 ppt< 3< 3
PFMPA4 ppt< 4< 4
PFNA4 ppt< 4< 4
PFOA4 ppt< 4< 4
PFOS4 ppt< 4< 4
PFPeA3 ppt< 3< 3
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
PFBS5018%6.7
2024-04-01
0.99–3.45<MRL<MRL4.96.2
PFOS5012%8.9
2024-04-02
0.66–4.18<MRL<MRL45
PFHxA506%48
2024-10-21
1.31–4.13<MRL<MRL<MRL4.6
PFOA506%6.2
2024-04-02
0.29–4.05<MRL<MRL<MRL4.2
PFPeA506%110
2024-10-21
2.9–5.72<MRL<MRL<MRL4
PFBA502%14
2024-10-21
0.28–5.18<MRL<MRL<MRL<MRL

Never detected (24): 11Cl-PF3OUdS, 4:2 FTS, 6:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFDA, PFDoA, PFEESA, PFHpA, PFHpS, PFHxS, PFMBA, PFMPA, PFNA, 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 2023-01-23 to 2026-05-19; 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 0fe9c0996add · 2026-10-18T04:09Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.