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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:
Nov 17, 2009 10:15AM Nov 24, 2009 10:12AM 0.29 450.20 19.17 5.02 4.91 Normal
Nov 10, 2009 10:46AM Nov 17, 2009 10:20AM 1.49 2244.90 23.83 5.17 4.88 Normal
Nov 3, 2009 11:07AM Nov 10, 2009 10:33AM 0.27 389.00 26.95 4.68 4.95 Moderately Acidified
Oct 27, 2009 11:41AM Nov 3, 2009 11:05AM 0.21 336.30 19.54 4.78 4.95 Mildly Acidified
Oct 20, 2009 10:34AM Oct 27, 2009 11:41AM 3.60 5849.20 9.91 5.02 4.93 Normal
Oct 13, 2009 11:21AM Oct 20, 2009 10:31AM 0.77 1047.00 8.03 5.00 4.93 Normal
Oct 6, 2009 09:43AM Oct 13, 2009 11:20AM 1.71 2475.10 8.51 4.91 5.03 Mildly Acidified
Sep 29, 2009 11:21AM Oct 6, 2009 09:42AM 0.74 1122.60 23.5 4.38 5.00 Strongly Acidified
Sep 22, 2009 11:07AM Sep 29, 2009 11:17AM 2.35 3747.20 7.53 4.98 4.97 Mildly Acidified
Sep 15, 2009 12:27PM Sep 22, 2009 11:04AM 0.02 0.30 Insuffient sample available for field measurements.
Sep 8, 2009 09:46AM Sep 15, 2009 12:16PM 0.02 44.50 Insuffient sample available for field measurements.
Sep 1, 2009 12:13PM Sep 8, 2009 09:45AM 0.00 0.00 Insuffient sample available for field measurements.
Aug 25, 2009 01:44PM Sep 1, 2009 12:09PM 3.53 6081.50 3.07 5.43 4.90 Normal
Aug 18, 2009 09:18AM Aug 25, 2009 01:41PM 2.50 4379.30 8.18 5.01 4.92 Normal
Aug 11, 2009 09:28AM Aug 18, 2009 09:16AM 0.00 1.40 Insuffient sample available for field measurements.
Aug 4, 2009 02:36PM Aug 11, 2009 09:27AM 0.00 10.80 Insuffient sample available for field measurements.
Jul 28, 2009 11:13AM Aug 4, 2009 02:31PM 0.82 1472.60 7.85 4.72 5.03 Mildly Acidified
Jul 21, 2009 09:33AM Jul 28, 2009 11:11AM 2.13 3198.30 5.58 5.06 4.97 Normal
Jul 14, 2009 09:51AM Jul 21, 2009 09:32AM 0.54 914.50 20.19 4.38 5.07 Strongly Acidified
Jul 7, 2009 10:09AM Jul 14, 2009 09:50AM 1.21 1962.10 9.60 4.71 4.99 Mildly Acidified
Jun 30, 2009 09:55AM Jul 7, 2009 10:08AM 1.34 2287.40 8.13 4.94 4.99 Mildly Acidified
Jun 23, 2009 02:21PM Jun 30, 2009 09:53AM 1.39 1993.30 10.81 4.75 4.98 Mildly Acidified
Jun 16, 2009 12:40PM Jun 23, 2009 02:20PM 4.76 7539.70 5.78 5.00 4.93 Normal
Jun 9, 2009 11:23AM Jun 16, 2009 12:35PM 3.80 6223.20 3.73 5.15 4.86 Normal
May 26, 2009 10:03AM Jun 2, 2009 11:12AM 2.08 3508.00 5.80 5.00 4.89 Normal
May 19, 2009 10:02AM May 26, 2009 10:02AM 0.13 229.90 16.45 4.66 4.91 Moderately 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