- PWSID
- GA0550000
- State
- Georgia
- System type
- community water system (CWS)
- Population served
- 9,190
- City
- Trion
- Counties
- Chattooga County, Walker County
- Primary source water
- groundwater
- UCMR 5 sampling
- 2024-05-07 to 2024-11-13 · 7 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
PFOA ≥ 3 × its limit highest single result
PFOA ≥ 3 × its limit worst entry-point average
Open on the Georgia map · All Georgia systems · All results
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
- Summerville (GA0550003)
Seller not monitored under UCMR 5. - Fort Payne, The Ww Bd Of The City Of (AL0000509)
Seller's highest results: PFOA <MRL · PFOS <MRL · HI 0
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 result | Worst entry-point average* | Limit | |
|---|---|---|---|
| PFOA (ppt) | 20 | 18.05 | 4 |
| PFOS (ppt) | 6.5 | 6.5 | 4 |
| Hazard Index | 0.075 | 0.065 | 1.0† |
“<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).
Sampling history
Sampled 2024-05-07 to 2024-11-13 · 7 entry point(s) · water types: GW · 23 sampling visits. PFAS in ppt (ng/L).
| Date | Entry point | Event | PFOA | PFOS | HI | Other detections |
|---|---|---|---|---|---|---|
| 2024-05-07 | CHATTOOGA COUNTY (GW) | SE1 | n/a | n/a | n/a | none |
| 2024-05-07 | CHATTOOGA COUNTY (GW) | SE1 | n/a | n/a | n/a | none |
| 2024-05-07 | CHATTOOGA COUNTY (GW) | SE1 | n/a | n/a | n/a | none |
| 2024-05-07 | CHATTOOGA COUNTY (GW) | SE1 | n/a | n/a | n/a | none |
| 2024-05-08 | CHATTOOGA COUNTY (GW) | SE1 | <4 | <4 | 0.075 | none |
| 2024-05-08 | CHATTOOGA COUNTY (GW) | SE1 | <4 | <4 | 0 | none |
| 2024-05-08 | CHATTOOGA COUNTY (GW) | SE1 | <4 | <4 | 0.006 | none |
| 2024-06-24 | CHATTOOGA COUNTY (GW) | SE1 | n/a | n/a | n/a | none |
| 2024-06-24 | CHATTOOGA COUNTY (GW) | SE1 | n/a | n/a | n/a | none |
| 2024-06-24 | CHATTOOGA COUNTY (GW) | SE1 | n/a | n/a | n/a | none |
| 2024-06-25 | CHATTOOGA COUNTY (GW) | SE1 | n/a | n/a | n/a | none |
| 2024-06-25 | CHATTOOGA COUNTY (GW) | SE1 | n/a | n/a | n/a | none |
| 2024-08-14 | CHATTOOGA COUNTY (GW) | SE1 | <4 | 4.9 | 0.017 | none |
| 2024-08-14 | CHATTOOGA COUNTY (GW) | SE1 | 12 | 6.5 | 0.065 | PFBA 7.3, PFHpA 5.6, PFHxA 10, PFPeA 15 |
| 2024-08-14 | CHATTOOGA COUNTY (GW) | SE1 | 20 | 5.6 | 0 | PFHpA 7.9, PFHxA 14, PFPeA 17 |
| 2024-08-14 | CHATTOOGA COUNTY (GW) | SE1 | 4.5 | 5.2 | 0.003 | PFPeA 3.7 |
| 2024-11-13 | CHATTOOGA COUNTY (GW) | SE2 | <4 | 4.4 | 0.026 | none |
| 2024-11-13 | CHATTOOGA COUNTY (GW) | SE2 | 9.2 | 6.5 | 0.057 | PFBA 6.2, PFHpA 5.4, PFHxA 9.3, PFPeA 13.8 |
| 2024-11-13 | CHATTOOGA COUNTY (GW) | SE2 | 16.1 | 5.3 | 0 | PFHpA 6.6, PFHxA 11.6, PFPeA 14.7 |
| 2024-11-13 | CHATTOOGA COUNTY (GW) | SE2 | 4 | 5.4 | 0.003 | PFPeA 3.2 |
| 2024-11-13 | CHATTOOGA COUNTY (GW) | SE2 | <4 | <4 | 0.054 | none |
| 2024-11-13 | CHATTOOGA COUNTY (GW) | SE2 | <4 | <4 | 0 | none |
| 2024-11-13 | CHATTOOGA COUNTY (GW) | SE2 | <4 | <4 | 0.005 | none |
“<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
420 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.
CHATTOOGA COUNTY facility 201 · sample point 301 · groundwater
| Compound | MRL | 2024-05-07 SE1 | 2024-06-24 SE1 | 2024-08-14 SE1 | 2024-11-13 SE2 |
|---|---|---|---|---|---|
| PFBS | 3 ppt | – | – | 34 | 51.9 |
| PFOS | 4 ppt | – | – | 4.9 | 4.4 |
| 11Cl-PF3OUdS | 5 ppt | – | – | < 5 | < 5 |
| 4:2 FTS | 3 ppt | – | – | < 3 | < 3 |
| 6:2 FTS | 5 ppt | – | – | < 5 | < 5 |
| 8:2 FTS | 5 ppt | – | – | < 5 | < 5 |
| 9Cl-PF3ONS | 2 ppt | – | – | < 2 | < 2 |
| ADONA | 3 ppt | – | – | < 3 | < 3 |
| HFPO-DA | 5 ppt | – | – | < 5 | < 5 |
| NEtFOSAA | 5 ppt | – | < 5 | – | < 5 |
| NFDHA | 20 ppt | – | – | < 20 | < 20 |
| NMeFOSAA | 6 ppt | – | < 6 | – | < 6 |
| PFBA | 5 ppt | – | – | < 5 | < 5 |
| PFDA | 3 ppt | – | – | < 3 | < 3 |
| PFDoA | 3 ppt | – | – | < 3 | < 3 |
| PFEESA | 3 ppt | – | – | < 3 | < 3 |
| PFHpA | 3 ppt | – | – | < 3 | < 3 |
| PFHpS | 3 ppt | – | – | < 3 | < 3 |
| PFHxA | 3 ppt | – | – | < 3 | < 3 |
| PFHxS | 3 ppt | – | – | < 3 | < 3 |
| PFMBA | 3 ppt | – | – | < 3 | < 3 |
| PFMPA | 4 ppt | – | – | < 4 | < 4 |
| PFNA | 4 ppt | – | – | < 4 | < 4 |
| PFOA | 4 ppt | – | – | < 4 | < 4 |
| PFPeA | 3 ppt | – | – | < 3 | < 3 |
| PFPeS | 4 ppt | – | – | < 4 | < 4 |
| PFTA | 8 ppt | – | < 8 | – | < 8 |
| PFTrDA | 7 ppt | – | < 7 | – | < 7 |
| PFUnA | 2 ppt | – | – | < 2 | < 2 |
| lithium | 9 µg/L | < 9 | – | – | < 9 |
CHATTOOGA COUNTY facility 202 · sample point 302 · groundwater
| Compound | MRL | 2024-05-07 SE1 | 2024-06-24 SE1 | 2024-08-14 SE1 | 2024-11-13 SE2 |
|---|---|---|---|---|---|
| PFBA | 5 ppt | – | – | 7.3 | 6.2 |
| PFBS | 3 ppt | – | – | 130 | 112.9 |
| PFHpA | 3 ppt | – | – | 5.6 | 5.4 |
| PFHxA | 3 ppt | – | – | 10 | 9.3 |
| PFOA | 4 ppt | – | – | 12 | 9.2 |
| PFOS | 4 ppt | – | – | 6.5 | 6.5 |
| PFPeA | 3 ppt | – | – | 15 | 13.8 |
| 11Cl-PF3OUdS | 5 ppt | – | – | < 5 | < 5 |
| 4:2 FTS | 3 ppt | – | – | < 3 | < 3 |
| 6:2 FTS | 5 ppt | – | – | < 5 | < 5 |
| 8:2 FTS | 5 ppt | – | – | < 5 | < 5 |
| 9Cl-PF3ONS | 2 ppt | – | – | < 2 | < 2 |
| ADONA | 3 ppt | – | – | < 3 | < 3 |
| HFPO-DA | 5 ppt | – | – | < 5 | < 5 |
| NEtFOSAA | 5 ppt | – | < 5 | – | < 5 |
| NFDHA | 20 ppt | – | – | < 20 | < 20 |
| NMeFOSAA | 6 ppt | – | < 6 | – | < 6 |
| PFDA | 3 ppt | – | – | < 3 | < 3 |
| PFDoA | 3 ppt | – | – | < 3 | < 3 |
| PFEESA | 3 ppt | – | – | < 3 | < 3 |
| PFHpS | 3 ppt | – | – | < 3 | < 3 |
| PFHxS | 3 ppt | – | – | < 3 | < 3 |
| PFMBA | 3 ppt | – | – | < 3 | < 3 |
| PFMPA | 4 ppt | – | – | < 4 | < 4 |
| PFNA | 4 ppt | – | – | < 4 | < 4 |
| PFPeS | 4 ppt | – | – | < 4 | < 4 |
| PFTA | 8 ppt | – | < 8 | – | < 8 |
| PFTrDA | 7 ppt | – | < 7 | – | < 7 |
| PFUnA | 2 ppt | – | – | < 2 | < 2 |
| lithium | 9 µg/L | < 9 | – | – | < 9 |
CHATTOOGA COUNTY facility 203 · sample point 303 · groundwater
| Compound | MRL | 2024-05-07 SE1 | 2024-06-25 SE1 | 2024-08-14 SE1 | 2024-11-13 SE2 |
|---|---|---|---|---|---|
| PFHpA | 3 ppt | – | – | 7.9 | 6.6 |
| PFHxA | 3 ppt | – | – | 14 | 11.6 |
| PFOA | 4 ppt | – | – | 20 | 16.1 |
| PFOS | 4 ppt | – | – | 5.6 | 5.3 |
| PFPeA | 3 ppt | – | – | 17 | 14.7 |
| 11Cl-PF3OUdS | 5 ppt | – | – | < 5 | < 5 |
| 4:2 FTS | 3 ppt | – | – | < 3 | < 3 |
| 6:2 FTS | 5 ppt | – | – | < 5 | < 5 |
| 8:2 FTS | 5 ppt | – | – | < 5 | < 5 |
| 9Cl-PF3ONS | 2 ppt | – | – | < 2 | < 2 |
| ADONA | 3 ppt | – | – | < 3 | < 3 |
| HFPO-DA | 5 ppt | – | – | < 5 | < 5 |
| NEtFOSAA | 5 ppt | – | < 5 | – | < 5 |
| NFDHA | 20 ppt | – | – | < 20 | < 20 |
| NMeFOSAA | 6 ppt | – | < 6 | – | < 6 |
| PFBA | 5 ppt | – | – | < 5 | < 5 |
| PFBS | 3 ppt | – | – | < 3 | < 3 |
| PFDA | 3 ppt | – | – | < 3 | < 3 |
| PFDoA | 3 ppt | – | – | < 3 | < 3 |
| PFEESA | 3 ppt | – | – | < 3 | < 3 |
| PFHpS | 3 ppt | – | – | < 3 | < 3 |
| PFHxS | 3 ppt | – | – | < 3 | < 3 |
| PFMBA | 3 ppt | – | – | < 3 | < 3 |
| PFMPA | 4 ppt | – | – | < 4 | < 4 |
| PFNA | 4 ppt | – | – | < 4 | < 4 |
| PFPeS | 4 ppt | – | – | < 4 | < 4 |
| PFTA | 8 ppt | – | < 8 | – | < 8 |
| PFTrDA | 7 ppt | – | < 7 | – | < 7 |
| PFUnA | 2 ppt | – | – | < 2 | < 2 |
| lithium | 9 µg/L | < 9 | – | – | < 9 |
CHATTOOGA COUNTY facility 204 · sample point 304 · groundwater
| Compound | MRL | 2024-05-07 SE1 | 2024-06-25 SE1 | 2024-08-14 SE1 | 2024-11-13 SE2 |
|---|---|---|---|---|---|
| PFBS | 3 ppt | – | – | 6.6 | 6.2 |
| PFOA | 4 ppt | – | – | 4.5 | 4 |
| PFOS | 4 ppt | – | – | 5.2 | 5.4 |
| PFPeA | 3 ppt | – | – | 3.7 | 3.2 |
| 11Cl-PF3OUdS | 5 ppt | – | – | < 5 | < 5 |
| 4:2 FTS | 3 ppt | – | – | < 3 | < 3 |
| 6:2 FTS | 5 ppt | – | – | < 5 | < 5 |
| 8:2 FTS | 5 ppt | – | – | < 5 | < 5 |
| 9Cl-PF3ONS | 2 ppt | – | – | < 2 | < 2 |
| ADONA | 3 ppt | – | – | < 3 | < 3 |
| HFPO-DA | 5 ppt | – | – | < 5 | < 5 |
| NEtFOSAA | 5 ppt | – | < 5 | – | < 5 |
| NFDHA | 20 ppt | – | – | < 20 | < 20 |
| NMeFOSAA | 6 ppt | – | < 6 | – | < 6 |
| PFBA | 5 ppt | – | – | < 5 | < 5 |
| PFDA | 3 ppt | – | – | < 3 | < 3 |
| PFDoA | 3 ppt | – | – | < 3 | < 3 |
| PFEESA | 3 ppt | – | – | < 3 | < 3 |
| PFHpA | 3 ppt | – | – | < 3 | < 3 |
| PFHpS | 3 ppt | – | – | < 3 | < 3 |
| PFHxA | 3 ppt | – | – | < 3 | < 3 |
| PFHxS | 3 ppt | – | – | < 3 | < 3 |
| PFMBA | 3 ppt | – | – | < 3 | < 3 |
| PFMPA | 4 ppt | – | – | < 4 | < 4 |
| PFNA | 4 ppt | – | – | < 4 | < 4 |
| PFPeS | 4 ppt | – | – | < 4 | < 4 |
| PFTA | 8 ppt | – | < 8 | – | < 8 |
| PFTrDA | 7 ppt | – | < 7 | – | < 7 |
| PFUnA | 2 ppt | – | – | < 2 | < 2 |
| lithium | 9 µg/L | < 9 | – | – | < 9 |
CHATTOOGA COUNTY facility 205 · sample point 305 · groundwater
| Compound | MRL | 2024-05-08 SE1 | 2024-06-24 SE1 | 2024-11-13 SE2 |
|---|---|---|---|---|
| PFBS | 3 ppt | 150 | – | 108.4 |
| 11Cl-PF3OUdS | 5 ppt | < 5 | – | < 5 |
| 4:2 FTS | 3 ppt | < 3 | – | < 3 |
| 6:2 FTS | 5 ppt | < 5 | – | < 5 |
| 8:2 FTS | 5 ppt | < 5 | – | < 5 |
| 9Cl-PF3ONS | 2 ppt | < 2 | – | < 2 |
| ADONA | 3 ppt | < 3 | – | < 3 |
| HFPO-DA | 5 ppt | < 5 | – | < 5 |
| NEtFOSAA | 5 ppt | – | < 5 | < 5 |
| NFDHA | 20 ppt | < 20 | – | < 20 |
| NMeFOSAA | 6 ppt | – | < 6 | < 6 |
| PFBA | 5 ppt | < 5 | – | < 5 |
| PFDA | 3 ppt | < 3 | – | < 3 |
| PFDoA | 3 ppt | < 3 | – | < 3 |
| PFEESA | 3 ppt | < 3 | – | < 3 |
| PFHpA | 3 ppt | < 3 | – | < 3 |
| PFHpS | 3 ppt | < 3 | – | < 3 |
| PFHxA | 3 ppt | < 3 | – | < 3 |
| PFHxS | 3 ppt | < 3 | – | < 3 |
| PFMBA | 3 ppt | < 3 | – | < 3 |
| PFMPA | 4 ppt | < 4 | – | < 4 |
| PFNA | 4 ppt | < 4 | – | < 4 |
| PFOA | 4 ppt | < 4 | – | < 4 |
| PFOS | 4 ppt | < 4 | – | < 4 |
| PFPeA | 3 ppt | < 3 | – | < 3 |
| PFPeS | 4 ppt | < 4 | – | < 4 |
| PFTA | 8 ppt | – | < 8 | < 8 |
| PFTrDA | 7 ppt | – | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | – | < 2 |
| lithium | 9 µg/L | < 9 | – | < 9 |
CHATTOOGA COUNTY facility 206 · sample point 306 · groundwater
| Compound | MRL | 2024-05-08 SE1 | 2024-11-13 SE2 |
|---|---|---|---|
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 |
| 4:2 FTS | 3 ppt | < 3 | < 3 |
| 6:2 FTS | 5 ppt | < 5 | < 5 |
| 8:2 FTS | 5 ppt | < 5 | < 5 |
| 9Cl-PF3ONS | 2 ppt | < 2 | < 2 |
| ADONA | 3 ppt | < 3 | < 3 |
| HFPO-DA | 5 ppt | < 5 | < 5 |
| NEtFOSAA | 5 ppt | < 5 | < 5 |
| NFDHA | 20 ppt | < 20 | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 6 |
| PFBA | 5 ppt | < 5 | < 5 |
| PFBS | 3 ppt | < 3 | < 3 |
| PFDA | 3 ppt | < 3 | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 |
| PFEESA | 3 ppt | < 3 | < 3 |
| PFHpA | 3 ppt | < 3 | < 3 |
| PFHpS | 3 ppt | < 3 | < 3 |
| PFHxA | 3 ppt | < 3 | < 3 |
| PFHxS | 3 ppt | < 3 | < 3 |
| PFMBA | 3 ppt | < 3 | < 3 |
| PFMPA | 4 ppt | < 4 | < 4 |
| PFNA | 4 ppt | < 4 | < 4 |
| PFOA | 4 ppt | < 4 | < 4 |
| PFOS | 4 ppt | < 4 | < 4 |
| PFPeA | 3 ppt | < 3 | < 3 |
| PFPeS | 4 ppt | < 4 | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
CHATTOOGA COUNTY facility 207 · sample point 307 · groundwater
| Compound | MRL | 2024-05-08 SE1 | 2024-11-13 SE2 |
|---|---|---|---|
| PFBS | 3 ppt | 12 | 10.8 |
| 11Cl-PF3OUdS | 5 ppt | < 5 | < 5 |
| 4:2 FTS | 3 ppt | < 3 | < 3 |
| 6:2 FTS | 5 ppt | < 5 | < 5 |
| 8:2 FTS | 5 ppt | < 5 | < 5 |
| 9Cl-PF3ONS | 2 ppt | < 2 | < 2 |
| ADONA | 3 ppt | < 3 | < 3 |
| HFPO-DA | 5 ppt | < 5 | < 5 |
| NEtFOSAA | 5 ppt | < 5 | < 5 |
| NFDHA | 20 ppt | < 20 | < 20 |
| NMeFOSAA | 6 ppt | < 6 | < 6 |
| PFBA | 5 ppt | < 5 | < 5 |
| PFDA | 3 ppt | < 3 | < 3 |
| PFDoA | 3 ppt | < 3 | < 3 |
| PFEESA | 3 ppt | < 3 | < 3 |
| PFHpA | 3 ppt | < 3 | < 3 |
| PFHpS | 3 ppt | < 3 | < 3 |
| PFHxA | 3 ppt | < 3 | < 3 |
| PFHxS | 3 ppt | < 3 | < 3 |
| PFMBA | 3 ppt | < 3 | < 3 |
| PFMPA | 4 ppt | < 4 | < 4 |
| PFNA | 4 ppt | < 4 | < 4 |
| PFOA | 4 ppt | < 4 | < 4 |
| PFOS | 4 ppt | < 4 | < 4 |
| PFPeA | 3 ppt | < 3 | < 3 |
| PFPeS | 4 ppt | < 4 | < 4 |
| PFTA | 8 ppt | < 8 | < 8 |
| PFTrDA | 7 ppt | < 7 | < 7 |
| PFUnA | 2 ppt | < 2 | < 2 |
| lithium | 9 µg/L | < 9 | < 9 |
Statistics by compound
| Compound | Results | Detected | Highest (date) | Mean bounds | KM median | P75 | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| PFBS | 14 | 71% | 150 2024-05-08 | 44.49–45.34 | 10.8 | 108.4 | 130 | 150 |
| PFOS | 14 | 57% | 6.5 2024-08-14 | 3.13–4.84 | 4.4 | 5.4 | 6.5 | 6.5 |
| PFOA | 14 | 43% | 20 2024-08-14 | 4.7–6.99 | <MRL | 9.2 | 16.1 | 20 |
| PFPeA | 14 | 43% | 17 2024-08-14 | 4.81–6.53 | <MRL | 13.8 | 15 | 17 |
| PFHpA | 14 | 29% | 7.9 2024-08-14 | 1.82–3.96 | <MRL | 5.4 | 6.6 | 7.9 |
| PFHxA | 14 | 29% | 14 2024-08-14 | 3.21–5.35 | <MRL | 9.3 | 11.6 | 14 |
| PFBA | 14 | 14% | 7.3 2024-08-14 | 0.96–5.25 | <MRL | <MRL | 6.2 | 7.3 |
Never detected (23): 11Cl-PF3OUdS, 4:2 FTS, 6:2 FTS, 8:2 FTS, 9Cl-PF3ONS, ADONA, HFPO-DA, NEtFOSAA, NFDHA, NMeFOSAA, PFDA, PFDoA, PFEESA, 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 2023-01-09 to 2026-06-17; 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 e0e919e2a26a · 2026-10-18T04:09Z · UCMR 5 release Jul2026 · SDWIS 2026Q3. Data and methods.