U.S. Energy Information Administration
Isobutane
EIA petroleum sum snd data for Isobutane.
Series
24
normalized EIA series
Observations
2,532
records in the database
Latest record
31 Mar 2026
newest observation
Cadences
2
annual, monthly
Series chart
Selected series performance
Latest
No value
No observation
Change
No prior value
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
U.S. Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbld-monthlyU.S.monthly50 MBBL/D31 Mar 2026 · 195 rows
U.S. Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbl-monthlyU.S.monthly1,536 MBBL31 Mar 2026 · 195 rows
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbld-monthlyPADD 1monthly1 MBBL/D31 Mar 2026 · 195 rows
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbl-monthlyPADD 1monthly23 MBBL31 Mar 2026 · 195 rows
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbld-monthlyPADD 2monthly13 MBBL/D31 Mar 2026 · 195 rows
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbl-monthlyPADD 2monthly400 MBBL31 Mar 2026 · 195 rows
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbld-monthlyPADD 3monthly36 MBBL/D31 Mar 2026 · 195 rows
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbl-monthlyPADD 3monthly1,127 MBBL31 Mar 2026 · 195 rows
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbld-monthlyPADD 4monthly-1 MBBL/D31 Mar 2026 · 195 rows
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbl-monthlyPADD 4monthly-25 MBBL31 Mar 2026 · 195 rows
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbld-monthlyPADD 5monthly0 MBBL/D31 Mar 2026 · 195 rows
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbl-monthlyPADD 5monthly11 MBBL31 Mar 2026 · 195 rows
U.S. Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbl-annualU.S.annual696 MBBL31 Dec 2025 · 16 rows
U.S. Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbld-annualU.S.annual2 MBBL/D31 Dec 2025 · 16 rows
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbl-annualPADD 1annual18 MBBL31 Dec 2025 · 16 rows
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbld-annualPADD 1annual0 MBBL/D31 Dec 2025 · 16 rows
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbl-annualPADD 2annual-223 MBBL31 Dec 2025 · 16 rows
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbld-annualPADD 2annual-1 MBBL/D31 Dec 2025 · 16 rows
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbl-annualPADD 3annual864 MBBL31 Dec 2025 · 16 rows
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbld-annualPADD 3annual2 MBBL/D31 Dec 2025 · 16 rows
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbl-annualPADD 4annual-14 MBBL31 Dec 2025 · 16 rows
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbld-annualPADD 4annual0 MBBL/D31 Dec 2025 · 16 rows
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbl-annualPADD 5annual51 MBBL31 Dec 2025 · 16 rows
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbld-annualPADD 5annual0 MBBL/D31 Dec 2025 · 16 rows
Latest observations
Recent records
U.S. Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbld-monthlymonthly50 MBBL/D31 Mar 2026
U.S. Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbl-monthlymonthly1,536 MBBL31 Mar 2026
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbld-monthlymonthly1 MBBL/D31 Mar 2026
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbl-monthlymonthly23 MBBL31 Mar 2026
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbld-monthlymonthly13 MBBL/D31 Mar 2026
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbl-monthlymonthly400 MBBL31 Mar 2026
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbld-monthlymonthly36 MBBL/D31 Mar 2026
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbl-monthlymonthly1,127 MBBL31 Mar 2026
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbld-monthlymonthly-1 MBBL/D31 Mar 2026
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbl-monthlymonthly-25 MBBL31 Mar 2026
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbld-monthlymonthly0 MBBL/D31 Mar 2026
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbl-monthlymonthly11 MBBL31 Mar 2026
U.S. Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbld-monthlymonthly27 MBBL/D28 Feb 2026
U.S. Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbl-monthlymonthly762 MBBL28 Feb 2026
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbld-monthlymonthly1 MBBL/D28 Feb 2026
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbl-monthlymonthly27 MBBL28 Feb 2026
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbld-monthlymonthly-2 MBBL/D28 Feb 2026
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbl-monthlymonthly-58 MBBL28 Feb 2026
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbld-monthlymonthly25 MBBL/D28 Feb 2026
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbl-monthlymonthly701 MBBL28 Feb 2026
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbld-monthlymonthly0 MBBL/D28 Feb 2026
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbl-monthlymonthly-8 MBBL28 Feb 2026
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbld-monthlymonthly4 MBBL/D28 Feb 2026
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbl-monthlymonthly100 MBBL28 Feb 2026
U.S. Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbld-monthlymonthly-28 MBBL/D31 Jan 2026
U.S. Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbl-monthlymonthly-881 MBBL31 Jan 2026
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbld-monthlymonthly-2 MBBL/D31 Jan 2026
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbl-monthlymonthly-69 MBBL31 Jan 2026
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbld-monthlymonthly-6 MBBL/D31 Jan 2026
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbl-monthlymonthly-198 MBBL31 Jan 2026
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbld-monthlymonthly-16 MBBL/D31 Jan 2026
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbl-monthlymonthly-500 MBBL31 Jan 2026
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbld-monthlymonthly1 MBBL/D31 Jan 2026
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbl-monthlymonthly38 MBBL31 Jan 2026
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbld-monthlymonthly-5 MBBL/D31 Jan 2026
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbl-monthlymonthly-152 MBBL31 Jan 2026
U.S. Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbl-annualannual696 MBBL31 Dec 2025
U.S. Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbld-annualannual2 MBBL/D31 Dec 2025
U.S. Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbld-monthlymonthly-25 MBBL/D31 Dec 2025
U.S. Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbl-monthlymonthly-783 MBBL31 Dec 2025
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbl-annualannual18 MBBL31 Dec 2025
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbld-annualannual0 MBBL/D31 Dec 2025
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbld-monthlymonthly1 MBBL/D31 Dec 2025
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbl-monthlymonthly27 MBBL31 Dec 2025
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbl-annualannual-223 MBBL31 Dec 2025
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbld-annualannual-1 MBBL/D31 Dec 2025
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbld-monthlymonthly-6 MBBL/D31 Dec 2025
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbl-monthlymonthly-181 MBBL31 Dec 2025
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbl-annualannual864 MBBL31 Dec 2025
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbld-annualannual2 MBBL/D31 Dec 2025
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbld-monthlymonthly-23 MBBL/D31 Dec 2025
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbl-monthlymonthly-721 MBBL31 Dec 2025
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbl-annualannual-14 MBBL31 Dec 2025
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbld-annualannual0 MBBL/D31 Dec 2025
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbld-monthlymonthly0 MBBL/D31 Dec 2025
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbl-monthlymonthly-1 MBBL31 Dec 2025
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbl-annualannual51 MBBL31 Dec 2025
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbld-annualannual0 MBBL/D31 Dec 2025
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbld-monthlymonthly3 MBBL/D31 Dec 2025
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbl-monthlymonthly93 MBBL31 Dec 2025
U.S. Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbld-monthlymonthly-12 MBBL/D30 Nov 2025
U.S. Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbl-monthlymonthly-363 MBBL30 Nov 2025
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbld-monthlymonthly-1 MBBL/D30 Nov 2025
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbl-monthlymonthly-21 MBBL30 Nov 2025
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbld-monthlymonthly4 MBBL/D30 Nov 2025
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbl-monthlymonthly112 MBBL30 Nov 2025
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbld-monthlymonthly-14 MBBL/D30 Nov 2025
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbl-monthlymonthly-433 MBBL30 Nov 2025
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbld-monthlymonthly1 MBBL/D30 Nov 2025
Rocky Mountain (PADD 4) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r40-mbbl-monthlymonthly34 MBBL30 Nov 2025
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbld-monthlymonthly-2 MBBL/D30 Nov 2025
West Coast (PADD 5) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r50-mbbl-monthlymonthly-55 MBBL30 Nov 2025
U.S. Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbld-monthlymonthly12 MBBL/D31 Oct 2025
U.S. Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-nus-mbbl-monthlymonthly376 MBBL31 Oct 2025
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbld-monthlymonthly2 MBBL/D31 Oct 2025
East Coast (PADD 1) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r10-mbbl-monthlymonthly66 MBBL31 Oct 2025
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbld-monthlymonthly-2 MBBL/D31 Oct 2025
Midwest (PADD 2) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r20-mbbl-monthlymonthly-58 MBBL31 Oct 2025
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels per Day)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbld-monthlymonthly13 MBBL/D31 Oct 2025
Gulf Coast (PADD 3) Stock Change of Isobutane (Thousand Barrels)eia-petroleum-petroleum-sum-snd-m-epllbai-scg-r30-mbbl-monthlymonthly414 MBBL31 Oct 2025
Sources and methodology
Source: U.S. Energy Information Administration (EIA) Open Data. Petroleum series include the cadence, product group, process, and geography published by EIA. World Price Index normalizes source data for charting and API access and does not imply EIA endorsement.