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| Minnesota, Wisconsin, North and South Dakota Refinery District Sulfur Content (Weighted Average) of Crude Oil Input to Refineries (Percent) | ||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1985 | 1.86 | 1.81 | 1.81 | 1.82 | 1.75 | 1.80 | 1.92 | 1.61 | 1.69 | 1.73 | 1.75 | 1.76 |
| 1986 | 1.99 | 1.83 | 1.87 | 1.93 | 2.01 | 1.96 | 2.03 | 1.99 | 2.12 | 1.89 | 2.07 | 1.92 |
| 1987 | 1.91 | 1.94 | 1.94 | 1.80 | 1.49 | 1.90 | 1.94 | 1.97 | 2.05 | 2.15 | 2.07 | 2.05 |
| 1988 | 2.07 | 2.12 | 1.99 | 2.24 | 2.28 | 2.12 | 2.17 | 2.15 | 2.06 | 2.04 | 1.87 | 1.90 |
| 1989 | 1.61 | 1.94 | 1.61 | 2.11 | 2.04 | 1.94 | 1.85 | 1.77 | 1.79 | 1.86 | 1.84 | 1.94 |
| 1990 | 2.07 | 2.00 | 1.92 | 1.98 | 1.95 | 1.86 | 1.79 | 1.70 | 1.76 | 1.71 | 1.72 | 1.96 |
| 1991 | 1.93 | 1.89 | 1.83 | 1.51 | 1.74 | 1.86 | 1.77 | 1.69 | 1.81 | 1.97 | 1.94 | 1.87 |
| 1992 | 1.89 | 1.90 | 1.93 | 3.16 | 1.83 | 1.86 | 1.75 | 1.77 | 1.68 | 1.68 | 1.69 | 1.77 |
| 1993 | 1.88 | 1.90 | 1.88 | 1.71 | 1.85 | 1.89 | 1.75 | 1.85 | 1.86 | 1.93 | 1.59 | 1.75 |
| 1994 | 1.96 | 2.00 | 1.84 | 1.95 | 1.62 | 1.99 | 1.95 | 1.65 | 1.78 | 1.83 | 1.97 | 1.72 |
| 1995 | 1.74 | 1.80 | 1.88 | 2.14 | 1.97 | 1.71 | 1.73 | 1.72 | 1.70 | 1.49 | 1.62 | 1.62 |
| 1996 | 1.60 | 1.63 | 1.66 | 1.55 | 1.61 | 1.72 | 1.66 | 1.71 | 1.75 | 2.11 | 2.15 | 2.21 |
| 1997 | 2.02 | 2.15 | 2.25 | 2.32 | 2.15 | 2.12 | 2.17 | 2.22 | 2.21 | 2.30 | 2.23 | 2.25 |
| 1998 | 2.26 | 2.32 | 2.14 | 2.07 | 2.14 | 2.22 | 2.15 | 2.07 | 2.20 | 2.25 | 2.22 | 2.28 |
| 1999 | 2.31 | 2.30 | 2.15 | 1.97 | 1.91 | 2.06 | 2.20 | 2.10 | 2.00 | 2.28 | 2.20 | 2.32 |
| 2000 | 2.36 | 2.32 | 2.27 | 2.18 | 2.27 | 2.17 | 2.06 | 2.12 | 2.18 | 2.19 | 2.28 | 2.35 |
| 2001 | 2.24 | 2.12 | 2.21 | 2.21 | 2.13 | 2.18 | 2.11 | 2.15 | 2.04 | 2.19 | 2.36 | 2.29 |
| 2002 | 2.31 | 2.37 | 2.24 | 2.24 | 2.30 | 2.39 | 2.32 | 2.04 | 2.36 | 2.42 | 2.31 | 2.30 |
| 2003 | 2.37 | 2.38 | 2.48 | 2.41 | 2.30 | 2.38 | 2.35 | 2.22 | 2.10 | 2.20 | 2.29 | 2.38 |
| 2004 | 2.32 | 2.23 | 2.13 | 2.27 | 2.14 | 2.30 | 2.26 | 2.19 | 1.95 | 2.14 | 2.22 | 2.35 |
| 2005 | 2.47 | 2.39 | 2.37 | 2.33 | 2.19 | 2.22 | 2.16 | 2.09 | 2.09 | 2.07 | 2.37 | 2.11 |
| 2006 | 2.26 | 2.34 | 2.30 | 2.24 | 2.21 | 2.14 | 2.27 | 2.15 | 2.02 | 2.21 | 2.27 | 2.22 |
| 2007 | 2.21 | 2.24 | 2.35 | 2.20 | 2.00 | 2.38 | 2.44 | 2.43 | 2.27 | 2.34 | 2.28 | 2.37 |
| 2008 | 2.30 | 2.27 | 2.10 | 2.16 | 2.30 | 2.02 | 2.07 | 2.17 | 1.98 | 2.03 | 2.16 | 2.07 |
| 2009 | 2.16 | 2.02 | 2.13 | 2.04 | 1.80 | 1.98 | 2.05 | 1.98 | 1.66 | 1.78 | 1.84 | 1.89 |
| 2010 | 1.90 | 1.89 | 2.07 | 2.01 | 1.97 | 1.88 | 1.86 | 2.00 | 1.99 | 2.02 | 2.13 | 2.12 |
| 2011 | 2.20 | 2.45 | 2.39 | 2.26 | 2.15 | 2.21 | 2.28 | 2.31 | 2.09 | 2.19 | 2.27 | 2.20 |
| 2012 | 2.39 | 2.39 | 2.32 | 2.37 | 2.23 | 2.29 | 2.20 | 2.08 | 1.96 | 2.08 | 2.10 | 2.08 |
| 2013 | 2.09 | 2.08 | 2.14 | 2.33 | 2.12 | 2.18 | 2.03 | 2.01 | 1.70 | 1.93 | 2.08 | 2.13 |
| 2014 | 2.02 | 2.01 | 1.87 | 1.94 | 1.67 | 1.95 | 2.16 | 2.15 | 2.16 | 2.10 | 1.88 | 2.01 |
| 2015 | 1.92 | 2.05 | 1.99 | 2.14 | 2.00 | 1.93 | 2.00 | 2.04 | 1.83 | 1.75 | 2.04 | 2.08 |
| 2016 | 2.10 | 2.21 | 2.05 | 1.97 | 1.83 | 1.98 | 2.00 | 2.05 | 2.13 | 1.97 | 1.92 | 2.05 |
| 2017 | 2.00 | 2.13 | 2.14 | 2.39 | 2.26 | 1.87 | 1.88 | 1.79 | 1.63 | 1.73 | 1.80 | 1.92 |
| 2018 | 1.90 | 1.87 | 1.96 | 2.00 | 1.98 | 1.95 | 1.84 | 1.91 | 1.91 | 1.74 | 1.89 | 1.82 |
| 2019 | 1.83 | 1.81 | 1.79 | 1.75 | 1.81 | 1.87 | 1.68 | 1.63 | 1.35 | 1.15 | 1.42 | 1.82 |
| 2020 | 1.70 | 1.71 | 2.07 | 2.06 | 1.96 | 1.99 | 2.08 | 1.90 | 1.89 | 1.72 | 1.72 | 1.82 |
| 2021 | 2.01 | 1.89 | 2.00 | 1.96 | 1.95 | 1.95 | 1.71 | 1.78 | 1.83 | 1.88 | 1.96 | 1.83 |
| 2022 | 1.84 | 1.96 | 1.88 | 1.81 | 1.77 | 1.57 | 1.77 | 1.73 | 1.64 | 1.74 | 1.87 | 1.94 |
| 2023 | 1.90 | 1.79 | 1.74 | 1.71 | 1.84 | 1.91 | 1.84 | 1.83 | 1.69 | 1.63 | 1.65 | 1.75 |
| 2024 | 1.77 | 1.90 | 1.94 | 1.78 | 1.87 | 2.16 | 2.07 | 1.84 | 1.56 | 1.66 | 1.98 | 1.99 |
| 2025 | 1.94 | 1.94 | 1.90 | 1.85 | 1.96 | 1.92 | 1.83 | 1.82 | ||||
| - = No Data Reported; -- = Not Applicable; NA = Not Available; W = Withheld to avoid disclosure of individual company data. |
| Release Date: 10/31/2025 |
| Next Release Date: 11/28/2025 |