| Warning Letter — Koch's Korner | 486812 Jan 7, 2016 |
| Warning Letter — Go For It | 486710 Jan 7, 2016 |
| Warning Letter — Cenex | 486718 Jan 7, 2016 |
| Warning Letter — Super Smokedale Tobacco | 486725 Jan 7, 2016 |
| Warning Letter — Tobacco & More | 486811 Jan 7, 2016 |
| Warning Letter — BP / FARMERS CO-OP OIL | 486719 Jan 7, 2016 |
| Warning Letter — Cenex | 486717 Jan 7, 2016 |
| Warning Letter — Sunshine Foods | 486611 Jan 7, 2016 |
| Warning Letter — Casey's General Stores | 486871 Jan 7, 2016 |
| Warning Letter — Cenex/United Xpress | 486644 Jan 7, 2016 |
| Warning Letter — Solomon's Bakery, LLC | 480895 Jan 5, 2016 |
| Warning Letter — Amy's Mini Mart | 485819 Dec 22, 2015 |
| Warning Letter — ARB Medical, LLC | 482215 Dec 22, 2015 |
| Warning Letter — Nelson's Shell Food Mart | 485617 Dec 17, 2015 |
| Warning Letter — SuperAmerica | 485018 Dec 10, 2015 |
| Warning Letter — Hy-Vee Gas | 484989 Dec 10, 2015 |
| Warning Letter — Super One Foods | 484479 Dec 3, 2015 |
| Warning Letter — Cenex | 483947 Nov 24, 2015 |
| Warning Letter — Casey's General Stores | 484267 Nov 24, 2015 |
| Warning Letter — Brad's Market | 483949 Nov 24, 2015 |
| Warning Letter — Dalton Corner Store | 483828 Nov 19, 2015 |
| Warning Letter — Walgreens #11690 | 483121 Nov 12, 2015 |
| Warning Letter — Cenex | 483181 Nov 12, 2015 |
| Warning Letter — Cenex | 482991 Nov 12, 2015 |
| Warning Letter — Roger's Wines & Spirits | 481084 Nov 6, 2015 |
| Warning Letter — Piedmont Liquor | 482501 Nov 5, 2015 |
| Warning Letter — Billy's Bar & Grill | 482716 Nov 5, 2015 |
| Warning Letter — Go For It! | 482300 Nov 5, 2015 |
| Warning Letter — Oasis Travel Plaza/Cenex | 482084 Oct 29, 2015 |
| Warning Letter — BP | 481964 Oct 29, 2015 |
| Warning Letter — Maynard's Food Center | 481853 Oct 29, 2015 |
| Warning Letter — North Shore Travel Plaza | 481961 Oct 29, 2015 |
| Warning Letter — Cedar Avenue Shell / Food Mart | 481666 Oct 22, 2015 |
| Warning Letter — Top Ten Wine & Spirits | 481243 Oct 15, 2015 |
| Warning Letter — Wal-Mart #1577 | 481215 Oct 15, 2015 |
| Warning Letter — Noble Parkway | 480989 Oct 8, 2015 |
| Warning Letter — Lucky Seven General Stores Northside | 480497 Oct 1, 2015 |
| Warning Letter — Lucky's Station | 480509 Oct 1, 2015 |
| Warning Letter — Drag Race | 480019 Sep 24, 2015 |
| Warning Letter — Kwik Trip | 480020 Sep 24, 2015 |
| Warning Letter — Smart Mart | 479935 Sep 24, 2015 |
| Warning Letter — B&D Market | 480022 Sep 24, 2015 |
| Warning Letter — Sammy's One Stop | 479996 Sep 24, 2015 |
| Warning Letter — Lake Region Co-Op/Cenex | 480130 Sep 24, 2015 |
| Warning Letter — BP/Shop | 480138 Sep 24, 2015 |
| Warning Letter — Casey's General Store | 480181 Sep 24, 2015 |
| Warning Letter — Flippin Bill's/BP | 480090 Sep 24, 2015 |
| Warning Letter — Casey's General Store | 479284 Sep 17, 2015 |
| Warning Letter — Cub Foods | 478873 Sep 10, 2015 |
| Warning Letter — Casey's General Stores | 478852 Sep 10, 2015 |