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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:
Dec 16, 2014 10:07AM Dec 23, 2014 08:35AM 1.24 1815.40 10.40 5.00 4.90 Normal
Dec 9, 2014 09:38AM Dec 16, 2014 10:06AM 4.11 6515.30 5.90 5.32 4.91 Normal
Dec 2, 2014 09:52AM Dec 9, 2014 09:34AM 2.37 3851.20 17.27 4.91 4.84 Mildly Acidified
Nov 25, 2014 09:16AM Dec 2, 2014 09:48AM 1.48 1551.40 5.01 5.21 4.84 Normal
Nov 18, 2014 10:56AM Nov 25, 2014 09:13AM 1.06 1612.10 11.16 5.04 4.81 Normal
Nov 12, 2014 08:43AM Nov 18, 2014 10:54AM 1.80 2556.90 6.08 4.89 4.85 Mildly Acidified
Nov 4, 2014 01:32PM Nov 12, 2014 08:41AM 0.63 1004.90 12.97 4.84 4.81 Mildly Acidified
Oct 28, 2014 11:14AM Nov 4, 2014 01:31PM 2.74 3756.70 5.44 5.16 4.82 Normal
Oct 21, 2014 09:57AM Oct 28, 2014 11:14AM 3.67 6006.40 10.10 5.02 4.86 Normal
Oct 14, 2014 10:07AM Oct 21, 2014 09:49AM 3.04 5091.30 5.51 4.85 4.88 Mildly Acidified
Oct 7, 2014 10:16AM Oct 14, 2014 10:05AM 0.53 847.20 4.79 Missing Missing Missing
Sep 30, 2014 12:44PM Oct 7, 2014 10:15AM 0.73 1198.40 10.05 4.80 4.80 Mildly Acidified
Sep 23, 2014 11:11AM Sep 30, 2014 12:43PM 0.13 148.70 40.12 4.54 4.87 Moderately Acidified
Sep 16, 2014 10:48AM Sep 23, 2014 11:08AM 0.20 261.50 7.68 4.94 4.84 Mildly Acidified
Sep 9, 2014 10:14AM Sep 16, 2014 10:46AM 0.22 115.40 14.45 4.79 4.84 Mildly Acidified
Sep 2, 2014 09:32AM Sep 9, 2014 10:13AM 0.52 915.00 10.43 4.71 4.90 Mildly Acidified
Aug 26, 2014 11:56AM Sep 2, 2014 09:31AM 0.51 849.50 7.51 4.79 4.86 Mildly Acidified
Aug 19, 2014 09:31AM Aug 26, 2014 11:53AM 0.00 3.80 Insuffient sample available for field measurements.
Aug 12, 2014 10:38AM Aug 19, 2014 08:29AM 1.41 2225.90 12.37 4.96 4.63 Mildly Acidified
Aug 5, 2014 09:15AM Aug 12, 2014 10:35AM 0.80 1376.40 5.97 5.09 4.82 Normal
Jul 29, 2014 09:38AM Aug 5, 2014 09:14AM 0.00 0.00 Insuffient sample available for field measurements.
Jul 22, 2014 10:29AM Jul 29, 2014 09:37AM 0.47 597.10 14.55 4.61 4.80 Moderately Acidified
Jul 15, 2014 10:04AM Jul 22, 2014 10:28AM 2.17 3447.50 5.65 4.97 4.94 Mildly Acidified
Jul 8, 2014 10:21AM Jul 15, 2014 10:00AM 0.43 737.10 16.79 4.42 4.82 Moderately Acidified
Jul 1, 2014 09:52AM Jul 8, 2014 10:20AM 3.51 5876.30 3.82 5.20 4.86 Normal
Jun 24, 2014 08:19AM Jul 1, 2014 09:51AM 1.61 2669.40 3.88 5.12 4.76 Normal

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