U.S. Energy Information Administration

Isobutane

EIA petroleum sum snd data for Isobutane.

Series

normalized EIA series

Observations

7,002

records in the database

Latest record

28 Feb 2026

newest observation

Cadences

annual, monthly

Series chart

Selected series performance

Series

Latest

No value

No observation

Change

No prior value

52W high

No value

No observation

52W low

No value

No observation

ATH

No value

No observation

ATL

No value

No observation

Series

Available petroleum series

/v1/commodities/eia-petroleum-isobutane-20d2958ba9/series

U.S. Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbld-monthlyU.S.monthly495 MBBL/D28 Feb 2026 · 542 rows

U.S. Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbl-monthlyU.S.monthly13,858 MBBL28 Feb 2026 · 542 rows

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbld-monthlyPADD 1monthly38 MBBL/D28 Feb 2026 · 542 rows

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbl-monthlyPADD 1monthly1,051 MBBL28 Feb 2026 · 542 rows

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbld-monthlyPADD 2monthly65 MBBL/D28 Feb 2026 · 542 rows

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbl-monthlyPADD 2monthly1,830 MBBL28 Feb 2026 · 542 rows

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbld-monthlyPADD 3monthly349 MBBL/D28 Feb 2026 · 542 rows

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbl-monthlyPADD 3monthly9,781 MBBL28 Feb 2026 · 542 rows

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbld-monthlyPADD 4monthly37 MBBL/D28 Feb 2026 · 542 rows

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbl-monthlyPADD 4monthly1,048 MBBL28 Feb 2026 · 542 rows

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbld-monthlyPADD 5monthly5 MBBL/D28 Feb 2026 · 542 rows

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbl-monthlyPADD 5monthly148 MBBL28 Feb 2026 · 542 rows

U.S. Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbl-annualU.S.annual176,917 MBBL31 Dec 2025 · 45 rows

U.S. Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbld-annualU.S.annual485 MBBL/D31 Dec 2025 · 43 rows

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbl-annualPADD 1annual13,271 MBBL31 Dec 2025 · 45 rows

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbld-annualPADD 1annual36 MBBL/D31 Dec 2025 · 37 rows

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbl-annualPADD 2annual24,284 MBBL31 Dec 2025 · 45 rows

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbld-annualPADD 2annual67 MBBL/D31 Dec 2025 · 37 rows

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbl-annualPADD 3annual124,420 MBBL31 Dec 2025 · 45 rows

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbld-annualPADD 3annual341 MBBL/D31 Dec 2025 · 37 rows

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbl-annualPADD 4annual13,043 MBBL31 Dec 2025 · 45 rows

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbld-annualPADD 4annual36 MBBL/D31 Dec 2025 · 37 rows

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbl-annualPADD 5annual1,899 MBBL31 Dec 2025 · 45 rows

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbld-annualPADD 5annual5 MBBL/D31 Dec 2025 · 37 rows

Latest observations

Recent records

U.S. Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbld-monthlymonthly495 MBBL/D28 Feb 2026

U.S. Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbl-monthlymonthly13,858 MBBL28 Feb 2026

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbld-monthlymonthly38 MBBL/D28 Feb 2026

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbl-monthlymonthly1,051 MBBL28 Feb 2026

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbld-monthlymonthly65 MBBL/D28 Feb 2026

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbl-monthlymonthly1,830 MBBL28 Feb 2026

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbld-monthlymonthly349 MBBL/D28 Feb 2026

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbl-monthlymonthly9,781 MBBL28 Feb 2026

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbld-monthlymonthly37 MBBL/D28 Feb 2026

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbl-monthlymonthly1,048 MBBL28 Feb 2026

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbld-monthlymonthly5 MBBL/D28 Feb 2026

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbl-monthlymonthly148 MBBL28 Feb 2026

U.S. Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbld-monthlymonthly471 MBBL/D31 Jan 2026

U.S. Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbl-monthlymonthly14,591 MBBL31 Jan 2026

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbld-monthlymonthly37 MBBL/D31 Jan 2026

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbl-monthlymonthly1,132 MBBL31 Jan 2026

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbld-monthlymonthly59 MBBL/D31 Jan 2026

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbl-monthlymonthly1,822 MBBL31 Jan 2026

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbld-monthlymonthly334 MBBL/D31 Jan 2026

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbl-monthlymonthly10,347 MBBL31 Jan 2026

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbld-monthlymonthly36 MBBL/D31 Jan 2026

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbl-monthlymonthly1,121 MBBL31 Jan 2026

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbld-monthlymonthly5 MBBL/D31 Jan 2026

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbl-monthlymonthly169 MBBL31 Jan 2026

U.S. Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbl-annualannual176,917 MBBL31 Dec 2025

U.S. Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbld-annualannual485 MBBL/D31 Dec 2025

U.S. Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbld-monthlymonthly483 MBBL/D31 Dec 2025

U.S. Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbl-monthlymonthly14,958 MBBL31 Dec 2025

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbl-annualannual13,271 MBBL31 Dec 2025

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbld-annualannual36 MBBL/D31 Dec 2025

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbld-monthlymonthly38 MBBL/D31 Dec 2025

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbl-monthlymonthly1,178 MBBL31 Dec 2025

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbl-annualannual24,284 MBBL31 Dec 2025

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbld-annualannual67 MBBL/D31 Dec 2025

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbld-monthlymonthly61 MBBL/D31 Dec 2025

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbl-monthlymonthly1,879 MBBL31 Dec 2025

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbl-annualannual124,420 MBBL31 Dec 2025

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbld-annualannual341 MBBL/D31 Dec 2025

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbld-monthlymonthly342 MBBL/D31 Dec 2025

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbl-monthlymonthly10,616 MBBL31 Dec 2025

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbl-annualannual13,043 MBBL31 Dec 2025

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbld-annualannual36 MBBL/D31 Dec 2025

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbld-monthlymonthly36 MBBL/D31 Dec 2025

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbl-monthlymonthly1,116 MBBL31 Dec 2025

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbl-annualannual1,899 MBBL31 Dec 2025

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbld-annualannual5 MBBL/D31 Dec 2025

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbld-monthlymonthly5 MBBL/D31 Dec 2025

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbl-monthlymonthly169 MBBL31 Dec 2025

U.S. Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbld-monthlymonthly499 MBBL/D30 Nov 2025

U.S. Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbl-monthlymonthly14,955 MBBL30 Nov 2025

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbld-monthlymonthly39 MBBL/D30 Nov 2025

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbl-monthlymonthly1,166 MBBL30 Nov 2025

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbld-monthlymonthly66 MBBL/D30 Nov 2025

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbl-monthlymonthly1,987 MBBL30 Nov 2025

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbld-monthlymonthly352 MBBL/D30 Nov 2025

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbl-monthlymonthly10,573 MBBL30 Nov 2025

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbld-monthlymonthly36 MBBL/D30 Nov 2025

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbl-monthlymonthly1,072 MBBL30 Nov 2025

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbld-monthlymonthly5 MBBL/D30 Nov 2025

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbl-monthlymonthly157 MBBL30 Nov 2025

U.S. Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbld-monthlymonthly492 MBBL/D31 Oct 2025

U.S. Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbl-monthlymonthly15,254 MBBL31 Oct 2025

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbld-monthlymonthly38 MBBL/D31 Oct 2025

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbl-monthlymonthly1,174 MBBL31 Oct 2025

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbld-monthlymonthly68 MBBL/D31 Oct 2025

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbl-monthlymonthly2,093 MBBL31 Oct 2025

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbld-monthlymonthly345 MBBL/D31 Oct 2025

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbl-monthlymonthly10,691 MBBL31 Oct 2025

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbld-monthlymonthly37 MBBL/D31 Oct 2025

Rocky Mountain (PADD 4) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r40-mbbl-monthlymonthly1,137 MBBL31 Oct 2025

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbld-monthlymonthly5 MBBL/D31 Oct 2025

West Coast (PADD 5) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r50-mbbl-monthlymonthly159 MBBL31 Oct 2025

U.S. Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbld-monthlymonthly503 MBBL/D30 Sept 2025

U.S. Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-nus-mbbl-monthlymonthly15,104 MBBL30 Sept 2025

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbld-monthlymonthly38 MBBL/D30 Sept 2025

East Coast (PADD 1) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r10-mbbl-monthlymonthly1,143 MBBL30 Sept 2025

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbld-monthlymonthly74 MBBL/D30 Sept 2025

Midwest (PADD 2) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r20-mbbl-monthlymonthly2,226 MBBL30 Sept 2025

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbld-monthlymonthly349 MBBL/D30 Sept 2025

Gulf Coast (PADD 3) Field Production of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-fpf-r30-mbbl-monthlymonthly10,483 MBBL30 Sept 2025