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

Below is the data summary for the following location:

Location: ME09 - Greenville - Squaw Brook (UM) [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:
May 14, 2013 11:54AM May 21, 2013 11:38AM 0.97 1701.30 1.7 5.42 4.76 Normal
May 7, 2013 11:41AM May 14, 2013 11:51AM 0.76 1261.70 1.3 4.98 4.80 Mildly Acidified
Apr 30, 2013 11:10AM May 7, 2013 11:39AM 0.00 0.00 Insuffient sample available for field measurements.
Apr 23, 2013 11:56AM Apr 30, 2013 11:05AM 0.03 49.10 Insuffient sample available for field measurements.
Apr 16, 2013 11:16AM Apr 23, 2013 11:56AM 0.44 773.80 1.5 5.03 4.92 Normal
Apr 9, 2013 11:58AM Apr 16, 2013 11:24AM 0.68 1066.00 1.5 5.05 4.90 Normal
Apr 2, 2013 12:06PM Apr 9, 2013 11:56AM 0.26 505.00 1.3 4.97 4.91 Mildly Acidified
Mar 26, 2013 12:30PM Apr 2, 2013 12:04PM 0.49 835.60 1.6 5.29 4.89 Normal
Mar 20, 2013 11:06AM Mar 26, 2013 12:28PM 0.01 14.40 Insuffient sample available for field measurements.
Mar 19, 2013 09:00AM Mar 26, 2013 08:59AM 1.12 1834.90 1.6 5.34 Missing Normal
Mar 12, 2013 12:24PM Mar 20, 2013 11:01AM 1.64 2278.00 1.5 5.34 4.98 Normal
Mar 5, 2013 12:22PM Mar 12, 2013 12:20PM 0.01 54.30 Insuffient sample available for field measurements.
Feb 26, 2013 12:17PM Mar 5, 2013 12:19PM 1.12 1834.90 1.6 5.45 5.44 Normal
Feb 19, 2013 10:55AM Feb 26, 2013 12:15PM 1.51 2560.60 1.6 5.27 4.81 Normal
Feb 12, 2013 12:13PM Feb 19, 2013 10:50AM 0.28 473.30 1.5 4.78 4.93 Mildly Acidified
Feb 5, 2013 11:45AM Feb 12, 2013 12:08PM 0.93 897.70 1.4 5.11 4.89 Normal
Jan 29, 2013 12:06PM Feb 5, 2013 11:40AM 1.04 1776.70 1.7 5.27 4.91 Normal
Jan 22, 2013 10:53AM Jan 29, 2013 12:04PM 0.00 0.00 Insuffient sample available for field measurements.
Jan 15, 2013 12:00PM Jan 22, 2013 10:50AM 0.55 892.10 1.8 4.96 4.86 Mildly Acidified
Jan 8, 2013 12:03PM Jan 15, 2013 11:58AM 0.08 130.90 2.1 4.97 4.48 Mildly Acidified
Sep 25, 2012 12:39PM Oct 2, 2012 11:31AM 2.01 3345.70 1.9 6.32 5.21 Normal
Sep 18, 2012 12:01PM Sep 25, 2012 12:34PM 1.82 3028.70 1.8 5.62 5.78 Normal
Sep 11, 2012 11:47AM Sep 18, 2012 11:59AM 0.00 0.00 Insuffient sample available for field measurements.
Sep 4, 2012 12:14PM Sep 11, 2012 11:44AM 3.10 5241.90 1.6 6.01 5.63 Normal
Aug 28, 2012 10:31AM Sep 4, 2012 12:11PM 0.00 0.00 Insuffient sample available for field measurements.
Aug 21, 2012 11:43AM Aug 28, 2012 10:29AM 0.53 933.20 Missing Missing Missing Missing

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