On Tuesday, May 25th the Consumer Product Safety Commission (CPSC) Drywall Information Center released a list of drywall manufacturers whose drywall produced high levels of hydrogen sulfide during testing.  They stated, “There is a strong association between hydrogen sulfide and metal corrosion.”

After testing they were able to determine the top ten samples which released the highest levels of hydrogen sulfide gases.  The top ten were all drywall samples made in China. Some of the emissions rates were documented at 100 times higher that drywall not produced in China.

The top ten included:

1. Knauf Plasterboard (Tianjin) Co. Ltd.: (year of manufacture 2005) China
2. Taian Taishan Plasterboard Co. Ltd.: (2006) China
3. Shandong Taihe Dongxin Co.: (2005) China
4. Knauf Plasterboard (Tianjin) Co. Ltd.: (2006) China
5. Taian Taishan Plasterboard Co. Ltd.: (2006) China
6. Taian Taishan Plasterboard Co. Ltd.: (2006) China
7. Shandong Chenxiang GBM Co. Ltd. (C&K Gypsum Board): (2006) China
8. Beijing New Building Materials (BNBM): (2009) China
9. Taian Taishan Plasterboard Co. Ltd.: (2009) China
10. Shandong Taihe Dongxin Co.: (2009) China

See the active emission levels for each sample here.

The CPSC has also listed other Chinese drywall samples that were tested but did not have significant hydrogen sulfide emission levels.