National Trends in Lead Concentrations in 1980 - 2014
| Year |
Mean |
Number of Trend Sites |
10th Percentile |
90th Percentile |
| 1980 |
1.54272727272727 |
11 |
0.6 |
2.64 |
| 1981 |
1.16363636363636 |
11 |
0.6 |
2.02 |
| 1982 |
0.95954545454545 |
11 |
0.6 |
1.29 |
| 1983 |
0.93545454545454 |
11 |
0.48 |
1.5 |
| 1984 |
0.90818181818181 |
11 |
0.47 |
1.44 |
| 1985 |
1.03181818181818 |
11 |
0.31 |
1.31 |
| 1986 |
0.5690909090909 |
11 |
0.18 |
1.05 |
| 1987 |
0.625 |
11 |
0.12 |
1.6 |
| 1988 |
1.11181818181818 |
11 |
0.09 |
1.57 |
| 1989 |
0.52181818181818 |
11 |
0.06 |
1.62 |
| 1990 |
0.33272727272727 |
11 |
0.06 |
0.63 |
| 1991 |
0.28090909090909 |
11 |
0.05 |
0.6 |
| 1992 |
0.24818181818181 |
11 |
0.05 |
0.43 |
| 1993 |
0.2090909090909 |
11 |
0.04 |
0.57 |
| 1994 |
0.23818181818181 |
11 |
0.04 |
0.84 |
| 1995 |
0.25272727272727 |
11 |
0.04 |
0.53 |
| 1996 |
0.1590909090909 |
11 |
0.03 |
0.27 |
| 1997 |
0.1590909090909 |
11 |
0.04 |
0.33 |
| 1998 |
0.14727272727272 |
11 |
0.04 |
0.33 |
| 1999 |
0.16454545454545 |
11 |
0.04 |
0.29 |
| 2000 |
0.17818181818181 |
11 |
0.03 |
0.33 |
| 2001 |
0.23727272727272 |
11 |
0.03 |
0.32 |
| 2002 |
0.11727272727272 |
11 |
0.02 |
0.24 |
| 2003 |
0.10636363636363 |
11 |
0.02 |
0.32 |
| 2004 |
0.2090909090909 |
11 |
0.02 |
0.43 |
| 2005 |
0.10636363636363 |
11 |
0.01 |
0.39 |
| 2006 |
0.09636363636363 |
11 |
0.01 |
0.29 |
| 2007 |
0.08818181818181 |
11 |
0.01 |
0.28 |
| 2008 |
0.09 |
11 |
0.01 |
0.24 |
| 2009 |
0.07863636363636 |
11 |
0.01 |
0.25 |
| 2010 |
0.06090909090909 |
11 |
0.01 |
0.2 |
| 2011 |
0.06363636363636 |
11 |
0.01 |
0.17 |
| 2012 |
0.07363636363636 |
11 |
0.01 |
0.22 |
| 2013 |
0.06363636363636 |
11 |
0.01 |
0.17 |
| 2014 |
0.03181818181818 |
11 |
0.01 |
0.05 |