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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: ME98 - Bar Harbor - McFarland Hill Site [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 8, 2014 12:19PM Apr 15, 2014 08:46AM 0.44 690.40 15.21 4.69 4.69 Moderately Acidified
Apr 1, 2014 08:29AM Apr 8, 2014 12:18PM 2.21 3373.40 8.01 5.01 4.71 Normal
Mar 25, 2014 08:51AM Apr 1, 2014 08:28AM 3.38 3164.40 9.42 5.00 4.71 Normal
Mar 18, 2014 11:22AM Mar 25, 2014 08:49AM 0.79 1211.00 Missing Missing Missing Missing
Mar 11, 2014 11:19AM Mar 18, 2014 11:18AM 1.65 2488.60 12.18 4.71 4.76 Mildly Acidified
Mar 4, 2014 11:25AM Mar 11, 2014 11:17AM 0.14 116.00 46.91 4.18 4.80 Strongly Acidified
Feb 25, 2014 11:43AM Mar 4, 2014 11:25AM 0.09 107.40 46.79 4.27 4.80 Strongly Acidified
Feb 18, 2014 10:39AM Feb 25, 2014 11:41AM 1.42 1380.30 9.60 4.79 4.75 Mildly Acidified
Feb 11, 2014 10:51AM Feb 18, 2014 10:37AM 2.87 2072.20 7.55 4.96 4.80 Mildly Acidified
Feb 4, 2014 10:47AM Feb 11, 2014 10:49AM 0.56 49.20 Insuffient sample available for field measurements.
Jan 28, 2014 09:58AM Feb 4, 2014 10:47AM 0.05 13.40 Insuffient sample available for field measurements.
Jan 21, 2014 09:00AM Jan 28, 2014 08:59AM 0.28 423.60 44.38 4.78 4.77 Mildly Acidified
Jan 14, 2014 09:45AM Jan 21, 2014 09:58AM 2.05 3044.10 4.50 5.01 4.81 Normal
Jan 7, 2014 02:53PM Jan 14, 2014 09:41AM 0.95 269.20 9.01 4.77 5.01 Mildly Acidified
Dec 31, 2013 09:28AM Jan 7, 2014 02:46PM 1.28 1064.20 8.32 5.01 4.88 Normal
Dec 24, 2013 07:58AM Dec 31, 2013 09:22AM 1.24 2015.50 Missing Missing Missing Missing
Dec 17, 2013 10:02AM Dec 24, 2013 07:53AM 1.83 2355.30 10.08 4.71 4.99 Mildly Acidified
Dec 10, 2013 09:22AM Dec 17, 2013 09:58AM 1.00 36.90 Insuffient sample available for field measurements.
Dec 3, 2013 10:10AM Dec 10, 2013 09:18AM 0.44 184.40 14.13 4.58 4.97 Moderately Acidified
Nov 26, 2013 09:11AM Dec 3, 2013 10:06AM 4.29 6426.70 15.72 5.02 4.92 Normal
Nov 19, 2013 10:44AM Nov 26, 2013 09:09AM 0.04 17.40 Insuffient sample available for field measurements.
Nov 12, 2013 09:58AM Nov 19, 2013 10:41AM 1.06 1307.70 7.61 5.08 4.97 Normal
Nov 5, 2013 08:31AM Nov 12, 2013 09:55AM 0.33 492.20 14.17 4.76 4.98 Mildly Acidified
Oct 29, 2013 08:51AM Nov 5, 2013 08:28AM 0.96 1132.40 15.29 5.72 4.98 Normal
Oct 22, 2013 09:22AM Oct 29, 2013 08:50AM 0.15 201.50 27.84 4.41 4.92 Moderately Acidified
Oct 22, 2013 09:19AM Oct 22, 2013 03:35PM 0.26 0.23 Insuffient sample available for field measurements.

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