National Trends in Lead Concentrations in 1980 - 2008
| Year |
Mean |
Number of Trend Sites |
10th Percentile |
90th Percentile |
| 1980 |
1.26263157894736 |
19 |
0.33 |
2.64 |
| 1981 |
1.36947368421052 |
19 |
0.3 |
3.75 |
| 1982 |
1.18526315789473 |
19 |
0.27 |
4.6 |
| 1983 |
0.88105263157894 |
19 |
0.29 |
1.27 |
| 1984 |
0.9778947368421 |
19 |
0.26 |
1.39 |
| 1985 |
0.75578947368421 |
19 |
0.2 |
1.14 |
| 1986 |
0.38526315789473 |
19 |
0.09 |
0.8 |
| 1987 |
0.42210526315789 |
19 |
0.06 |
1.6 |
| 1988 |
0.34421052631578 |
19 |
0.05 |
1.57 |
| 1989 |
0.31684210526315 |
19 |
0.04 |
1.62 |
| 1990 |
0.35684210526315 |
19 |
0.04 |
0.63 |
| 1991 |
0.20894736842105 |
19 |
0.03 |
0.4 |
| 1992 |
0.14421052631578 |
19 |
0.03 |
0.29 |
| 1993 |
0.12315789473684 |
19 |
0.01 |
0.3 |
| 1994 |
0.14684210526315 |
19 |
0.03 |
0.28 |
| 1995 |
0.09 |
19 |
0.01 |
0.24 |
| 1996 |
0.0978947368421 |
19 |
0.01 |
0.13 |
| 1997 |
0.11421052631578 |
19 |
0.01 |
0.2 |
| 1998 |
0.08842105263157 |
19 |
0.02 |
0.14 |
| 1999 |
0.11842105263157 |
19 |
0.02 |
0.19 |
| 2000 |
0.07894736842105 |
19 |
0.02 |
0.11 |
| 2001 |
0.07894736842105 |
19 |
0.01 |
0.12 |
| 2002 |
0.07631578947368 |
19 |
0.01 |
0.1 |
| 2003 |
0.1078947368421 |
19 |
0.01 |
0.33 |
| 2004 |
0.11052631578947 |
19 |
0 |
0.43 |
| 2005 |
0.0778947368421 |
19 |
0 |
0.18 |
| 2006 |
0.06578947368421 |
19 |
0 |
0.14 |
| 2007 |
0.10157894736842 |
19 |
0 |
0.2 |
| 2008 |
0.10105263157894 |
19 |
0.01 |
0.28 |