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Department of Environmental Protection - Bureau of Air Quality
Air Quality - Online Data Service
Home : Atmospheric Deposition (Acid Rain) : Monitoring Location Selection

Below is the data summary for the following location:

Location: ME02 - Bridgton - Upper Ridge Road [select a new location]

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Supplemental Information: term definitions | general description of pH readings

Sample Start Date: Sample Stop Date: Total Precipitation - Rain Gauge: (inches) Total Precipitation - Sample Weight: (grams) Field Conductance Reading: (us/cm) Field pH Reading: Field pH Check Sample Reading: Precipitation Acidity Level:
Apr 30, 2013 12:36PM May 7, 2013 08:30AM 0.00 1.60 Insuffient sample available for field measurements.
Apr 23, 2013 08:30AM May 30, 2013 12:36PM 0.00 0.30 Insuffient sample available for field measurements.
Apr 16, 2013 01:15PM Apr 23, 2013 08:30AM 0.00 485.60 7.4 4.7 4.72 Mildly Acidified
Apr 9, 2013 08:30AM Apr 16, 2013 01:15PM 0.00 1365.00 7.95 4.5 4.8 Moderately Acidified
Apr 2, 2013 04:20PM Apr 9, 2013 08:30AM 0.00 512.70 20.3 4.55 4.8 Moderately Acidified
Mar 26, 2013 09:30AM Apr 2, 2013 04:20PM 0.47 815.70 5.62 4.76 4.78 Mildly Acidified
Mar 18, 2013 12:55PM Mar 26, 2013 09:30AM 0.00 649.80 5.0 4.8 4.95 Mildly Acidified
Mar 12, 2013 11:40AM Mar 18, 2013 12:55PM 0.00 1474.30 10.35 4.65 4.8 Moderately Acidified
Mar 5, 2013 09:00AM Mar 12, 2013 11:40AM 0.06 219.90 18.59 4.51 0.0 Moderately Acidified
Feb 26, 2013 01:20PM Mar 5, 2013 09:00AM 0.00 1177.10 3.74 5.1 4.88 Normal
Feb 19, 2013 03:00PM Feb 26, 2013 01:20PM 0.00 1450.60 9.17 4.72 4.8 Mildly Acidified
Feb 12, 2013 01:30PM Feb 19, 2013 03:00PM 0.00 124.90 18.78 4.49 4.9 Moderately Acidified
Feb 5, 2013 10:40AM Feb 12, 2013 01:30PM 0.00 628.00 3.9 4.9 5.0 Mildly Acidified
Jan 29, 2013 02:00PM Feb 5, 2013 10:40AM 0.00 1473.90 9.14 4.65 4.95 Moderately Acidified
Jan 22, 2013 09:00AM Jan 29, 2013 02:00PM 0.00 0.14 Insuffient sample available for field measurements.
Jan 15, 2013 09:15AM Jan 22, 2013 09:00AM 0.00 413.40 4.8 4.84 4.82 Mildly Acidified
Jan 8, 2013 03:15PM Jan 15, 2013 09:15AM 0.24 81.30 69.5 4.7 4.9 Mildly Acidified
Dec 31, 2012 10:10AM Jan 8, 2013 03:15PM 0.00 2.10 Insuffient sample available for field measurements.
Dec 25, 2012 01:40PM Dec 31, 2012 08:50AM 0.00 319.50 4.1 4.95 4.89 Mildly Acidified
Dec 17, 2012 01:45PM Dec 25, 2012 01:40PM 3.56 4127.70 4.06 5.08 4.9 Normal
Dec 11, 2012 12:29PM Dec 17, 2012 01:45PM 0.90 1255.00 5.08 4.9 4.8 Mildly Acidified
Dec 4, 2012 02:00PM Dec 11, 2012 12:29PM 0.79 1522.90 9.77 7.83 4.62 Slightly alkaline
Nov 27, 2012 10:00AM Dec 4, 2012 02:00PM 0.49 637.10 14.9 4.5 4.8 Moderately Acidified
Nov 20, 2012 03:30PM Nov 27, 2012 10:00AM 1.01 1.50 Insuffient sample available for field measurements.
Nov 13, 2012 04:00PM Nov 20, 2012 03:30PM 0.00 0.00 Insuffient sample available for field measurements.
Nov 6, 2012 01:59PM Nov 13, 2012 04:00PM 0.60 1001.10 4.9 4.75 4.8 Mildly Acidified

Term Definitions

Term: Definition
Sample Start Date Start date of the sample collection period.
Sample Stop Date Stop date of the sample collection period.
Total Precipitation - Rain Gauge (inches) Total amount of precipitation measured during the sample collection period in inches.
Total Precipitation - Sample Weight (grams) Weight of the precipitation collected during the sample collection period.
Field Conductance Reading (us/cm) Conductance is a measure of the ability of water to conduct an electrical current.  It provides an indication of the amount of dissolved material in the sample.  Units are microsiemens per centimeter.
Field pH Reading pH measures the scale of acidity of the water based on the hydrogen ion's activity.  The range goes from 0-14, with 7 being neutral.  pH of less than 7 indicates acidity, whereas a pH of greater than 7 indicates a base.  The natural background of rainwater in New England has a pH of approximately 5.0.
Field pH Check Sample Reading Quality Control Check Sample is used to verify the calibration of the pH Meter.  The check sample should read 4.90 +/- 0.20 pH units.
Precipitation Acidity Level General description of the acidity level based on the field pH reading.

General description of pH readings

pH Range Precipitation Acidity Category
7.00 - 9.99 Slightly alkaline
5.00 - 6.99 Normal
4.70 - 4.99 Mildly Acidified
4.40 - 4.69 Moderately Acidified
4.10 - 4.39 Strongly Acidified
1.00 - 4.09 Severely Acidified

 

Questions about this Service? Contact the Bureau at: (207) 287-2437 or Email: depair@maine.gov