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Region 1: EPA New England

MAINE

For 1999 and after, click on the date for the corresponding eight-hour average peak ozone map for that day.

In October 2015, EPA revised the 8-hour ozone standard and changed the Air Quality Index (AQI) to align with this new standard. Maps for days in 2007 and earlier are based on the 1997 8-hour ozone standard (0.08 ppm). Maps for 2008 through 2015 are based on the 2008 ozone standard (0.075 ppm). Maps for 2016 are based on the 2015 ozone standard (0.070 ppm). Click Here for a table showing the revised AQI breakpoints for the 1997, 2008, and 2015 ozone standards.

Acadia NP - Cadillac Mtn | Acadia NP - McFarland Hill | Bowdoinham | Cape Elizabeth | Castine | Dover-Foxcroft | Durham | Gardiner | Georgetown | Holden | Hollis | Jonesport | Kennebunkport | Kittery | Lovell | Phippsburg | Port Clyde | Shapleigh | West Buxton

Acadia NP - Cadillac Mtn
Operating from 1995 to Present
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1995 4 5 0.094 Aug 1 0.091 Aug 10 0.079 Aug 11 0.077 Oct 14
1996 11 13 0.086 June 7 0.083 Aug 7 0.082 June 2 0.082 July 19
1997 10 15 0.095 June 21 0.093 July 1 0.093 Aug 10 0.085 July 7
1998 15 21 0.105 July 14 0.102 May 29 0.101 July 17 0.094 July 15
1999 14 17 0.107 July 16 0.103 Aug 25 0.098 May 31 0.090 June 25
2000 5 10 0.097 July 3 0.088 July 4 0.086 Aug 9 0.078 July 2
2001 18 23 0.107 June 19 0.102 July 24 0.101 May 12 0.101 July 23
2002 18 24 0.111 Aug 14 0.106 Aug 12 0.106 Aug 13 0.100 Aug 15
2003 3 11 0.103 June 27 0.091 July 8 0.086 July 3 0.083 June 26
2004 8 11 0.084 April 30 0.083 June 8 0.082 July 1 0.082 July 30
2005 10 15 0.094 June 9 0.094 June 10 0.088 July 26 0.083 June 25
2006 4 10 0.092 July 16 0.085 June 19 0.082 July 10 0.080 March 31
2007 10 15 0.097 June 27 0.094 Aug 3 0.089 Sept 7 0.086 Aug 30
2008 1 6 0.078 July 8 0.075 June 22 0.074 April 23 0.074 July 3
2009 2 4 0.085 May 21 0.077 Aug 18 0.075 April 28 0.074 May 22
2010 4 5 0.089 May 2 0.081 Sep 3 0.079 Sep 2 0.076 May 1
2011 2 3 0.092 June 8 0.078 July 21 0.074 June 9 0.074 July 11
2012 0 1 0.071 Sept 14 0.070 June 29 0.069 April 15 0.066 July 13
2013 1 2 0.078 June 1 0.073 Aug 22 0.069 June 22 0.068 April 29
2014 0 1 0.072 June 30 0.070 June 2 0.066 Sept 5 0.065 June 9
2015 2 2 0.080 Aug 18 0.076 Sept 18 0.072 Sept 19 0.070 May 25
2016 1 1 0.076 July 22 0.064 Aug 25 0.063 April 22 0.060 Mar 9

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Acadia NP - McFarland Hill
Operating from 1989 to Present, Relocated in 1997
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1994 1 7 0.082 July 21 0.075 July 2 0.075 Aug 4 0.075 Aug 28
1995 11 14 0.104 Aug 1 0.103 July 5 0.093 July 13 0.092 June 24
1996 3 4 0.097 Aug 6 0.087 Aug 7 0.077 June 2 0.073 June 7
1997 4 7 0.090 July 1 0.081 Aug 10 0.080 June 21 0.077 July 7
1998 9 21 0.111 July 15 0.110 July 14 0.109 May 29 0.088 May 28
1999 9 12 0.111 July 16 0.094 May 31 0.093 May 30 0.092 Aug 25
2000 0 2 0.073 June 22 0.073 July 2 0.070 May 18 0.070 June 21
2001 15 20 0.101 June 19 0.100 Aug 2 0.098 June 15 0.094 July 23
2002 10 18 0.109 Aug 13 0.100 Aug 14 0.090 Sept 10 0.089 Aug 12
2003 5 7 0.091 June 27 0.088 June 25 0.084 Aug 22 0.080 July 3
2004 3 6 0.079 April 30 0.077 July 1 0.076 Aug 3 0.073 July 30
2005 1 5 0.083 June 25 0.075 July 26 0.075 July 27 0.074 June 24
2006 0 3 0.074 March 31 0.072 July 2 0.072 July 10 0.070 June 18
2007 9 11 0.092 June 27 0.085 July 26 0.083 May 25 0.083 June 26
2008 0 0 0.070 July 3 0.067 June 22 0.065 July 8 0.064 July 2
2009 2 4 0.086 May 21 0.077 Aug 18 0.073 April 28 0.073 May 22
2010 2 3 0.087 Sep 2 0.077 Sep 1 0.072 May 2 0.070 Sep 3
2011 0 1 0.074 July 21 0.068 July 11 0.066 June 8 0.066 July 17
2012 0 0 0.067 June 29 0.065 April 15 0.065 July 13 0.060 April 27
2013 1 3 0.079 June 1 0.072 Aug 22 0.071 May 31 0.069 June 22
2014 0 0 0.070 June 9 0.068 June 30 0.062 April 11 0.062 July 23
2015 1 1 0.076 Sept 18 0.069 June 11 0.068 May 25 0.065 May 16
2016 1 2 0.079 July 22 0.071 April 22 0.068 July 18 0.066 Aug 25

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Bowdoinham
Operating from 2009 to 2015
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
2008 0 3 0.072 July 3 0.072 July 9 0.071 July 8 0.065 July 26
2009 0 0 0.069 Aug 18 0.068 May 21 0.064 April 28 0.063 April 25
2010 0 1 0.071 Sep 2 0.070 July 28 0.064 Sep 1 0.061 May 2
2011 0 0 0.066 July 11 0.066 July 21 0.063 Aug 18 0.061 July 20
2012 0 0 0.067 July 13 0.065 April 16 0.064 April 15 0.062 June 29
2013 0 1 0.073 June 1 0.064 Aug 22 0.061 May 31 0.061 Aug 21
2014 0 0 0.064 June 30 0.061 June 2 0.059 April 11 0.058 June 9
2015 0 0 0.062 May 4 0.060 April 13 0.060 Sept 18 0.057 May 25

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Cape Elizabeth
Operating from 1982 to Present
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1994 12 18 0.111 July 21 0.102 Aug 4 0.091 July 20 0.088 July 2
1995 9 14 0.116 Aug 1 0.102 July 14 0.098 Aug 10 0.096 July 13
1996 7 8 0.092 Aug 6 0.090 July 18 0.087 Aug 7 0.083 July 12
1997 13 17 0.118 June 30 0.117 July 1 0.103 June 21 0.103 Aug 10
1998 6 11 0.116 July 14 0.107 July 15 0.103 May 29 0.089 Aug 6
1999 4 9 0.103 July 16 0.090 May 31 0.081 Aug 25 0.076 July 17
2000 1 1 0.080 July 3 0.069 July 2 0.068 June 1 0.067 June 21
2001 12 12 0.105 Aug 2 0.103 June 19 0.102 June 20 0.097 July 24
2002 11 16 0.103 Aug 13 0.102 June 26 0.102 Aug 14 0.096 Sept 8
2003 2 7 0.084 June 27 0.083 June 25 0.074 Aug 22 0.073 June 26
2004 1 2 0.078 July 30 0.072 Aug 10 0.068 July 1 0.068 Aug 3
2005 2 7 0.083 July 26 0.078 Aug 27 0.073 June 25 0.073 Aug 8
2006 1 3 0.078 July 18 0.074 Aug 1 0.073 July 10 0.070 June 19
2007 5 10 0.099 June 27 0.085 July 26 0.084 Aug 3 0.083 June 26
2008 1 2 0.076 July 3 0.075 July 8 0.070 July 26 0.069 April 18
2009 2 2 0.085 Aug 18 0.081 May 21 0.070 May 22 0.070 Aug 17
2010 2 4 0.096 Sep 2 0.080 July 28 0.072 July 17 0.072 Sep 1
2011 1 3 0.090 July 21 0.071 July 6 0.071 June 11 0.070 Aug 18
2012 2 3 0.078 Aug 3 0.076 July 13 0.074 June 29 0.066 April 15
2013 3 5 0.081 Sept 11 0.080 June 1 0.077 May 31 0.072 Aug 22
2014 0 1 0.071 July 22 0.067 Aug 27 0.066 June 2 0.066 Sept 5
2015 0 1 0.073 Sept 18 0.067 May 26 0.066 May 25 0.064 May 4
2016 0 0 0.069 July 22 0.067 July 15 0.065 Aug 11 0.065 Aug 25

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Castine
Operating from 2002 to 2007
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
2002 7 9 0.090 Sept 10 0.089 Aug 13 0.085 Aug 14 0.082 Sept 8
2003 5 6 0.094 June 27 0.079 June 25 0.079 July 3 0.076 June 26
2004 0 1 0.072 July 1 0.070 April 19 0.070 July 30 0.068 June 8
2005 1 1 0.081 June 25 0.070 Aug 27 0.069 July 27 0.068 April 19
2006 0 0 0.069 July 10 0.068 April 12 0.067 July 2 0.065 June 17
2007 3 5 0.094 June 27 0.079 April 23 0.079 May 25 0.075 June 26

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Dover-Foxcroft
Operating from 1998 to 2001
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.084 0.075
1998 0 0 0.075 May 1 0.063 July 14 0.061 May 29 0.061 Aug 10
1999 1 1 0.091 June 1 0.070 June 25 0.067 May 31 0.067 July 15
2000 0 0 0.068 June 16 0.064 May 4 0.061 Aug 23 0.060 June 25
2001 2 2 0.080 June 19 0.079 May 2 0.068 June 30 0.068 July 24

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Durham
Operating from 2007 to Present
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
2007 6 10 0.092 Aug 3 0.087 April 23 0.086 May 25 0.081 May 10
2008 1 3 0.079 July 9 0.075 July 8 0.072 April 18 0.070 April 23
2009 0 0 0.068 May 21 0.068 May 22 0.068 Aug 18 0.067 April 25
2010 0 0 0.064 July 28 0.062 July 5 0.060 May 2 0.058 Sep 2
2011 0 0 0.068 July 11 0.064 June 8 0.063 July 20 0.063 July 21
2012 0 0 0.069 July 13 0.066 June 29 0.063 Aug 9 0.061 April 15
2013 0 0 0.068 June 1 0.060 April 29 0.059 April 28 0.059 April 30
2014 0 0 0.067 June 30 0.065 June 2 0.065 July 1 0.065 Sept 5
2015 0 0 0.069 May 4 0.061 Aug 3 0.060 May 25 0.058 April 13
2016 0 0 0.062 Aug 25 0.061 July 13 0.057 June 27 0.056 May 21

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Gardiner
Operating from 1991 to Present
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1994 5 6 0.094 July 21 0.085 Aug 4 0.085 July 2 0.082 Aug 9
1995 1 6 0.080 July 13 0.074 Aug 1 0.073 June 2 0.073 July 5
1996 5 5 0.087 Aug 7 0.081 June 2 0.078 Aug 8 0.076 June 12
1997 4 8 0.097 July 1 0.092 Aug 11 0.080 Aug 10 0.076 July 27
1998 4 7 0.095 July 16 0.094 July 15 0.091 July 14 0.077 July 28
1999 7 11 0.087 Aug 25 0.084 June 1 0.082 May 31 0.080 July 16
2000 0 1 0.075 June 16 0.069 July 2 0.068 June 21 0.063 July 14
2001 7 13 0.097 June 19 0.091 July 23 0.090 Aug 2 0.084 Sept 8
2002 9 12 0.094 Aug 15 0.093 Sept 10 0.090 June 21 0.088 Aug 13
2003 2 2 0.086 June 27 0.079 July 3 0.070 July 8 0.069 June 26
2004 1 4 0.084 July 30 0.074 April 30 0.071 July 1 0.071 Aug 10
2005 2 3 0.083 July 26 0.079 Aug 27 0.073 June 25 0.070 June 21
2006 1 2 0.076 July 10 0.074 July 25 0.067 June 19 0.065 June 22
2007 6 10 0.088 Aug 3 0.081 May 25 0.080 June 27 0.079 April 23
2008 0 1 0.071 April 18 0.069 July 3 0.068 July 8 0.068 July 9
2009 0 1 0.072 Aug 18 0.068 May 21 0.067 April 25 0.066 May 22
2010 1 1 0.079 July 8 0.069 July 28 0.067 May 2 0.059 Sep 1
2011 0 0 0.069 July 11 0.065 July 21 0.063 June 8 0.063 Aug 18
2012 0 0 0.067 July 13 0.066 April 15 0.064 April 16 0.064 April 20
2013 0 1 0.073 June 1 0.067 Aug 22 0.065 April 29 0.065 April 30
2014 0 0 0.066 Sept 5 0.062 June 30 0.058 July 22 0.057 June 2
2015 0 0 0.068 May 4 0.064 Aug 3 0.063 April 13 0.063 May 25
2016 0 0 0.065 Aug 25 0.061 July 13 0.059 April 22 0.059 June 27

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Georgetown
Operating from 2002 to 2007
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
2002 10 10 0.101 Sept 10 0.100 Aug 13 0.097 Aug 14 0.096 Sept 8
2003 3 5 0.088 June 27 0.085 June 25 0.079 Aug 22 0.074 June 26
2004 1 3 0.080 July 30 0.074 Aug 10 0.071 June 8 0.069 April 19
2005 1 3 0.079 July 26 0.074 June 25 0.072 June 24 0.068 Aug 5
2006 0 1 0.073 July 10 0.068 July 2 0.067 July 9 0.065 Aug 1
2007 5 9 0.097 June 27 0.082 June 26 0.079 July 26 0.079 Aug 3

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Holden
Operating from 1993 to Present
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1994 2 4 0.085 July 21 0.078 July 20 0.075 Aug 4 0.071 May 31
1995 7 9 0.097 July 5 0.088 July 13 0.079 June 2 0.078 Aug 10
1996 0 4 0.073 June 2 0.072 Aug 7 0.072 Aug 8 0.071 May 16
1997 3 3 0.084 July 1 0.077 Aug 11 0.076 Aug 10 0.070 July 27
1998 4 4 0.096 July 14 0.089 July 15 0.080 May 1 0.077 July 16
1999 5 9 0.082 June 1 0.081 July 16 0.080 May 31 0.080 Aug 25
2000 0 2 0.072 July 14 0.071 Aug 9 0.065 June 16 0.061 June 25
2001 11 12 0.103 June 19 0.092 July 23 0.091 June 20 0.088 July 24
2002 7 9 0.097 Aug 13 0.091 June 21 0.090 Sept 10 0.089 Aug 14
2003 2 5 0.110 June 27 0.076 July 3 0.074 June 25 0.073 June 26
2004 1 2 0.076 April 30 0.074 June 8 0.067 July 30 0.065 Aug 10
2005 0 1 0.073 June 25 0.069 July 26 0.068 April 17 0.067 June 21
2006 0 1 0.074 May 15 0.066 June 22 0.065 April 12 0.064 May 26
2007 2 6 0.079 May 25 0.078 April 23 0.075 May 24 0.074 June 27
2008 0 2 0.072 April 18 0.071 July 3 0.068 June 22 0.062 July 8
2009 0 1 0.077 May 21 0.064 April 25 0.064 Aug 18 0.057 May 20
2010 0 0 0.067 May 2 0.066 July 28 0.060 Sep 3 0.059 May 3
2011 0 0 0.061 July 21 0.058 June 8 0.056 April 10 0.055 May 6
2012 0 0 0.066 April 15 0.060 July 13 0.058 April 20 0.058 June 29
2013 1 1 0.076 June 1 0.065 April 29 0.065 Aug 22 0.064 April 30
2014 0 0 0.059 Sept 5 0.058 June 30 0.056 June 2 0.054 April 11
2015 0 1 0.072 Sept 18 0.063 May 4 0.063 Sept 19 0.061 April 13
2016 0 0 0.062 Aug 25 0.059 April 22 0.057 May 13 0.057 May 21

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Hollis
Operating from 1997 to 1998
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1997 4 7 0.104 July 1 0.085 Aug 11 0.080 Aug 10 0.077 July 27
1998 3 5 0.079 July 17 0.078 May 29 0.077 July 16 0.072 May 15

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Jonesport
Operating from 1989 to 1995, restarted 2005
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1994 4 8 0.084 July 13 0.083 Aug 10 0.079 Aug 28 0.077 July 21
1995 8 9 0.101 Aug 1 0.091 June 18 0.083 Aug 10 0.082 June 19
2005 1 2 0.089 June 25 0.073 June 24 0.067 Sept 22 0.062 July 27
2006 0 0 0.067 July 2 0.063 July 9 0.061 Aug 14 0.060 May 26
2007 4 4 0.086 June 26 0.084 June 27 0.078 June 28 0.078 Sept 26
2008 0 0 0.060 June 26 0.060 July 3 0.059 May 8 0.058 Aug 18
2009 1 2 0.084 May 21 0.074 Aug 18 0.066 May 22 0.061 Aug 19
2010 1 1 0.078 Sep 2 0.065 July 28 0.064 July 17 0.061 June 19
2011 0 1 0.072 July 17 0.061 Sept 13 0.058 May 6 0.057 July 6
2012 0 0 0.060 July 13 0.058 April 26 0.057 April 27 0.057 June 29
2013 1 1 0.079 July 19 0.069 Sept 21 0.066 June 1 0.062 Aug 22
2014 0 0 0.065 June 9 0.060 April 11 0.055 Sept 5 0.054 July 28
2015 0 0 0.067 June 11 0.065 Sept 18 0.064 May 25 0.062 Sept 7
2016 0 0 0.062 July 22 0.058 Mar 09 0.058 May 21 0.057 June 21

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Kennebunkport
Operating from 1983 to Present
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.084 0.075
1994 14 19 0.114 July 21 0.104 Aug 4 0.096 July 20 0.091 Aug 28
1995 10 18 0.121 Aug 1 0.106 Aug 10 0.103 July 13 0.103 July 14
1996 7 9 0.096 Aug 6 0.095 Aug 7 0.094 July 18 0.084 July 12
1997 13 14 0.119 June 30 0.112 June 21 0.107 June 1 0.101 June 29
1998 8 13 0.112 July 14 0.099 July 15 0.086 May 29 0.086 Aug 5
1999 12 19 0.114 July 16 0.102 May 31 0.092 Aug 25 0.089 Aug 17
2000 2 4 0.089 July 3 0.076 July 2 0.074 June 16 0.073 June 21
2001 11 13 0.107 Aug 2 0.104 June 19 0.098 July 23 0.096 June 20
2002 17 24 0.120 Aug 14 0.115 Aug 13 0.109 June 26 0.101 Sept 8
2003 4 8 0.093 June 25 0.085 June 27 0.079 Aug 21 0.076 June 26
2004 4 4 0.086 July 30 0.076 July 1 0.076 Aug 3 0.076 Aug 10
2005 2 5 0.084 July 26 0.076 July 27 0.075 June 25 0.071 July 22
2006 4 6 0.082 June 19 0.079 July 18 0.079 Aug 1 0.077 July 10
2007 6 9 0.099 June 27 0.091 Aug 3 0.086 July 26 0.078 Aug 2
2008 1 4 0.080 July 8 0.077 July 3 0.076 July 26 0.073 Sept 4
2009 2 4 0.087 Aug 18 0.077 May 22 0.075 May 21 0.072 Aug 15
2010 3 5 0.095 Sep 2 0.078 Sep 1 0.076 July 28 0.072 July 17
2011 2 4 0.086 July 21 0.076 July 6 0.074 July 23 0.073 Aug 18
2012 4 4 0.082 July 13 0.079 Aug 3 0.079 Aug 23 0.077 June 29
2013 4 7 0.084 Sept 11 0.081 June 1 0.076 May 31 0.076 Aug 22
2014 0 2 0.071 July 22 0.071 July 23 0.068 June 30 0.066 July 8
2015 1 2 0.081 Sept 18 0.072 July 30 0.068 Sept 2 0.067 Aug 17
2016 0 2 0.073 Aug 25 0.071 Aug 11 0.069 July 28 0.068 July 21

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Kittery
Operating from 1995 to 2007
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1995 9 12 0.107 June 30 0.099 Aug 10 0.094 Aug 1 0.088 July 13
1996 8 10 0.084 July 18 0.081 July 12 0.080 July 8 0.079 Aug 7
1997 11 13 0.112 July 1 0.104 June 30 0.095 June 21 0.092 June 29
1998 10 11 0.097 Aug 5 0.095 Aug 6 0.092 July 16 0.089 May 29
1999 9 13 0.112 July 16 0.093 Aug 25 0.091 May 31 0.085 June 24
2000 1 3 0.082 July 3 0.073 July 2 0.071 June 16 0.070 June 21
2001 9 14 0.096 June 15 0.096 June 19 0.090 June 20 0.090 Aug 2
2002 15 20 0.112 Aug 14 0.110 Aug 13 0.107 Aug 12 0.094 June 21
2003 7 10 0.090 June 25 0.086 June 27 0.083 Aug 21 0.080 April 15
2004 4 7 0.100 July 30 0.083 July 22 0.081 Aug 3 0.080 July 23
2005 2 6 0.077 June 25 0.077 Aug 8 0.072 June 24 0.072 July 27
2006 1 2 0.082 June 19 0.072 June 18 0.070 July 15 0.069 July 25
2007 4 5 0.080 Sept 7 0.076 May 25 0.076 July 26 0.076 Aug 3

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Lovell
Operating from 1992 to 2015
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1994 2 2 0.085 May 31 0.076 Aug 4 0.067 July 5 0.066 June 11
1995 1 2 0.088 July 5 0.075 July 6 0.062 July 14 0.061 May 5
1996 1 1 0.083 June 2 0.068 April 20 0.064 May 16 0.059 Aug 8
1997 0 0 0.061 April 16 0.060 July 1 0.058 April 30 0.057 May 1
1998 0 1 0.075 May 1 0.062 April 15 0.062 April 14 0.060 May 15
1999 1 1 0.076 June 1 0.065 July 17 0.061 May 31 0.061 June 12
2000 0 0 0.065 May 4 0.058 May 5 0.057 April 17 0.055 May 7
2001 1 2 0.077 May 2 0.072 May 3 0.069 May 10 0.068 May 12
2002 1 1 0.085 Aug 15 0.067 May 6 0.064 Aug 12 0.060 Sept 10
2003 0 1 0.071 April 15 0.064 June 29 0.063 April 28 0.059 July 3
2004 0 0 0.068 July 22 0.067 May 1 0.066 April 30 0.063 April 19
2005 0 1 0.071 April 17 0.070 April 20 0.067 Aug 27 0.061 June 25
2006 0 0 0.062 April 12 0.061 May 26 0.056 April 30 0.055 April 19
2007 1 4 0.084 May 25 0.075 April 23 0.074 May 9 0.074 May 10
2008 0 0 0.065 April 19 0.064 April 18 0.063 April 23 0.059 May 8
2009 0 0 0.060 April 25 0.060 May 22 0.059 May 21 0.057 May 4
2010 0 0 0.056 April 22 0.054 March 7 0.054 April 3 0.054 April 4
2011 0 0 0.061 April 10 0.060 May 7 0.054 April 3 0.054 April 9
2012 0 0 0.066 April 20 0.062 April 16 0.060 May 20 0.056 April 15
2013 0 0 0.056 April 27 0.053 May 1 0.053 May 7 0.052 March 31
2014 0 0 0.067 June 3 0.056 April 22 0.056 May 12 0.053 April 21
2015 0 0 0.067 May 4 0.059 May 24 0.058 April 13 0.053 May 7

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Phippsburg
Operating from 1993 to 2000
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1994 14 20 0.101 July 21 0.101 Aug 4 0.092 July 2 0.090 July 1
1995 15 20 0.126 July 14 0.125 Aug 1 0.104 July 13 0.099 June 18
1996 12 17 0.097 Aug 6 0.092 July 18 0.089 June 7 0.089 Aug 7
1997 11 12 0.116 June 30 0.111 July 1 0.102 June 21 0.098 Aug 10
1998 8 15 0.116 July 14 0.109 May 29 0.104 July 15 0.091 Aug 5
1999 11 13 0.108 July 16 0.091 July 17 0.089 May 31 0.087 July 23
2000 3 8 0.087 July 3 0.082 Aug 9 0.078 July 2 0.075 June 1

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Port Clyde
Operating from 1992 to Present
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1994 8 14 0.096 July 21 0.094 Aug 4 0.086 Aug 28 0.085 July 13
1995 12 12 0.115 Aug 1 0.114 July 14 0.099 June 18 0.090 June 19
1996 7 8 0.099 Aug 6 0.085 Aug 7 0.082 July 18 0.081 July 19
1997 6 10 0.109 June 30 0.100 July 1 0.099 Aug 10 0.090 June 17
1998 5 9 0.102 July 14 0.092 July 15 0.092 May 29 0.077 Sept 27
1999 7 8 0.110 July 16 0.100 July 17 0.083 May 31 0.081 May 30
2000 2 3 0.084 Aug 9 0.081 July 3 0.072 June 22 0.070 Aug 8
2001 14 18 0.111 Aug 2 0.099 June 19 0.093 July 24 0.091 June 30
2002 11 12 0.097 Aug 14 0.095 Sept 8 0.092 Sept 10 0.088 Sept 9
2003 9 11 0.107 Aug 22 0.085 June 25 0.085 June 27 0.082 July 26
2004 0 4 0.075 July 30 0.074 April 19 0.074 June 8 0.074 June 9
2005 3 7 0.102 June 25 0.080 June 24 0.076 July 25 0.075 July 26
2006 0 5 0.080 July 2 0.080 July 14 0.073 Aug 1 0.072 July 18
2007 6 6 0.096 June 27 0.093 June 26 0.085 May 25 0.082 July 26
2008 0 0 0.068 July 3 0.061 May 8 0.061 July 8 0.061 Sept 4
2009 2 3 0.085 May 21 0.085 Aug 18 0.072 May 22 0.069 Aug 17
2010 2 3 0.092 Sep 2 0.076 July 17 0.075 July 28 0.070 Sep 1
2011 0 3 0.075 July 21 0.072 July 17 0.071 July 11 0.068 July 22
2012 0 0 0.069 July 13 0.067 Aug 3 0.062 June 29 0.062 July 17
2013 4 5 0.082 July 19 0.077 May 31 0.076 June 1 0.076 Sept 11
2014 0 0 0.066 Aug 27 0.064 July 22 0.062 July 23 0.062 Sept 5
2015 1 1 0.076 Sept 18 0.070 June 11 0.070 Sept 7 0.067 May 25
2016 0 1 0.077 July 22 0.068 July 15 0.065 Aug 11 0.063 Aug 25

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Shapleigh
Operating from 2009 to Present
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
2008 0 0 0.061 July 26 0.060 July 3 0.060 July 9 0.057 June 22
2009 0 0 0.070 May 22 0.066 May 21 0.065 April 25 0.063 April 28
2010 0 1 0.072 May 2 0.071 July 28 0.067 Sep 1 0.066 Sep 3
2011 0 1 0.072 July 11 0.066 July 20 0.064 June 8 0.064 July 21
2012 0 1 0.074 July 13 0.070 April 16 0.069 April 20 0.065 July 12
2013 0 0 0.069 April 29 0.067 April 28 0.067 April 30 0.064 June 1
2014 0 0 0.068 June 3 0.066 June 17 0.062 May 12 0.061 April 22
2015 0 1 0.073 May 4 0.064 May 25 0.063 April 13 0.062 May 24
2016 0 0 0.066 June 20 0.066 July 13 0.061 April 22 0.061 July 1

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West Buxton
Operating from 1999 to Present
Year # Days > 1st High (ppm) Date 2nd High (ppm) Date 3rd High (ppm) Date 4th High (ppm) Date
0.075 0.070
1999 5 9 0.085 June 1 0.084 Aug 25 0.083 July 30 0.080 July 17
2000 0 1 0.075 June 16 0.069 June 21 0.067 June 25 0.066 June 1
2001 1 4 0.097 June 19 0.074 Aug 16 0.074 Sept 8 0.072 June 14
2002 8 10 0.100 Aug 14 0.095 Aug 12 0.086 Aug 15 0.083 Aug 13
2003 3 3 0.081 April 15 0.080 July 3 0.077 June 29 0.069 June 27
2004 3 7 0.082 July 22 0.077 April 30 0.076 April 19 0.075 June 8
2005 4 7 0.082 Aug 27 0.080 April 20 0.079 Sept 14 0.076 Aug 10
2006 0 3 0.075 June 19 0.073 July 27 0.071 June 18 0.069 July 26
2007 5 7 0.084 May 10 0.082 May 25 0.082 Aug 30 0.081 April 23
2008 0 1 0.075 April 23 0.070 April 18 0.063 April 19 0.061 May 26
2009 0 0 0.070 April 25 0.069 May 22 0.068 May 21 0.062 April 28
2010 0 0 0.070 July 28 0.058 April 22 0.058 June 19 0.058 Sep 1
2011 0 0 0.062 July 20 0.061 June 8 0.060 July 17 0.059 May 7
2012 1 2 0.077 July 13 0.075 April 16 0.069 April 20 0.065 July 12
2013 0 0 0.066 April 30 0.065 April 28 0.065 April 29 0.063 June 1
2014 0 0 0.062 June 17 0.061 June 2 0.061 July 22 0.059 May 12
2015 0 0 0.068 May 4 0.063 Aug 3 0.059 May 25 0.058 April 13
2016 0 0 0.067 July 13 0.061 June 27 0.058 May 21 0.058 July 1

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