National Trends in Lead Concentrations in 1990 - 2014
| Year |
Mean |
Number of Trend Sites |
10th Percentile |
90th Percentile |
| 1990 |
1.39545454545454 |
22 |
0.06 |
2.26 |
| 1991 |
1.28090909090909 |
22 |
0.05 |
1.92 |
| 1992 |
1.33772727272727 |
22 |
0.04 |
3.17 |
| 1993 |
1.89090909090909 |
22 |
0.04 |
2.16 |
| 1994 |
1.45727272727272 |
22 |
0.04 |
1.99 |
| 1995 |
0.95181818181818 |
22 |
0.04 |
2.13 |
| 1996 |
0.85545454545454 |
22 |
0.04 |
2.28 |
| 1997 |
0.41 |
22 |
0.04 |
1.17 |
| 1998 |
0.27272727272727 |
22 |
0.04 |
0.83 |
| 1999 |
0.31 |
22 |
0.04 |
0.92 |
| 2000 |
0.32681818181818 |
22 |
0.04 |
1.08 |
| 2001 |
0.45545454545454 |
22 |
0.03 |
1.22 |
| 2002 |
0.22045454545454 |
22 |
0.02 |
0.87 |
| 2003 |
0.2240909090909 |
22 |
0.03 |
0.48 |
| 2004 |
0.22863636363636 |
22 |
0.03 |
0.45 |
| 2005 |
0.11477272727272 |
22 |
0.01 |
0.37 |
| 2006 |
0.10818181818181 |
22 |
0.01 |
0.36 |
| 2007 |
0.11727272727272 |
22 |
0.02 |
0.28 |
| 2008 |
0.10818181818181 |
22 |
0.01 |
0.28 |
| 2009 |
0.1 |
22 |
0.01 |
0.32 |
| 2010 |
0.10227272727272 |
22 |
0.01 |
0.33 |
| 2011 |
0.13 |
22 |
0.01 |
0.21 |
| 2012 |
0.08545454545454 |
22 |
0.01 |
0.29 |
| 2013 |
0.09136363636363 |
22 |
0.01 |
0.24 |
| 2014 |
0.03681818181818 |
22 |
0.01 |
0.1 |