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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: ME04 - Carrabassett Valley (Penobscot Indian Nation) [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:
Mar 21, 2013 02:30PM Mar 26, 2013 02:30PM 0.00 0.00 Insuffient sample available for field measurements.
Mar 14, 2013 04:01PM Mar 21, 2013 02:30PM 0.74 1271.00 2.4 6.52 5.01 Normal
Mar 6, 2013 03:20PM Mar 14, 2013 04:00PM 1.42 2453.70 7.5 6.61 5.01 Normal
Feb 26, 2013 02:28PM Mar 6, 2013 03:19PM 0.88 1517.60 4.4 6.35 5.01 Normal
Feb 19, 2013 11:21AM Feb 26, 2013 02:28PM 0.98 1696.20 4.2 6.97 5.01 Normal
Feb 12, 2013 11:30AM Feb 19, 2013 11:20AM 0.02 40.20 Insuffient sample available for field measurements.
Feb 5, 2013 01:25PM Feb 12, 2013 11:30AM 0.18 304.30 Missing Missing Missing Missing
Jan 29, 2013 01:13PM Feb 5, 2013 01:25PM 1.26 2167.40 2.8 6.80 5.01 Normal
Jan 22, 2013 12:35PM Jan 29, 2013 01:12PM 0.00 0.20 Insuffient sample available for field measurements.
Jan 15, 2013 01:30PM Jan 22, 2013 12:30PM 0.29 501.50 9.5 7.46 5.01 Slightly alkaline
Jan 7, 2013 01:00PM Jan 15, 2013 01:30PM 0.02 28.00 Insuffient sample available for field measurements.
Jan 2, 2013 01:16PM Jan 7, 2013 01:00PM 0.03 59.70 Insuffient sample available for field measurements.
Dec 28, 2012 02:30PM Jan 2, 2013 01:15PM 0.09 160.90 Missing Missing Missing Missing
Dec 21, 2012 02:30PM Dec 28, 2012 02:29PM 2.47 4258.30 6.7 8.51 5.01 Slightly alkaline
Dec 11, 2012 11:01AM Dec 21, 2012 02:30PM 2.89 4999.90 Missing Missing Missing Missing
Dec 4, 2012 10:06AM Dec 11, 2012 11:00AM 0.78 1341.70 16.8 6.17 5.01 Normal
Nov 27, 2012 11:45AM Dec 4, 2012 10:05AM 0.20 344.70 12.5 5.54 5.01 Normal
Nov 21, 2012 02:00PM Nov 27, 2012 11:45AM 0.13 229.30 Missing Missing Missing Missing
Nov 13, 2012 03:35PM Nov 21, 2012 02:00PM 0.00 0.00 Insuffient sample available for field measurements.
Nov 6, 2012 12:00PM Nov 13, 2012 03:35PM 0.41 706.20 5.9 6.52 5.00 Normal
Oct 31, 2012 01:01PM Nov 6, 2012 12:00PM 0.10 166.30 Missing Missing Missing Missing
Oct 23, 2012 11:19AM Oct 31, 2012 01:01PM 3.64 6273.00 10.0 7.02 5.01 Slightly alkaline
Oct 16, 2012 11:45AM Oct 23, 2012 11:15AM 1.17 2025.30 3.2 6.38 5.01 Normal
Oct 9, 2012 01:31PM Oct 16, 2013 11:45AM 1.18 2026.20 4.4 6.72 5.01 Normal
Oct 2, 2012 02:00PM Oct 9, 2012 01:30PM 0.52 897.50 8.5 6.42 5.00 Normal
Sep 25, 2012 12:01PM Oct 2, 2012 02:00PM 1.59 2746.90 2.2 6.10 5.00 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