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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: ME96 - Freeport - Wolfe's Neck Farm [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 10, 2020 07:29AM Mar 17, 2020 07:35AM 0.98 1696.70 17.84 5.30 4.84 Normal
Mar 3, 2020 07:43AM Mar 10, 2020 07:25AM 0.21 337.90 20.22 4.84 4.84 Mildly Acidified
Feb 25, 2020 06:49AM Mar 3, 2020 07:41AM 1.45 2250.70 28.7 4.80 4.79 Mildly Acidified
Feb 18, 2020 07:40AM Feb 25, 2020 06:45AM 0.56 890.10 13.23 4.88 4.79 Mildly Acidified
Feb 11, 2020 07:49AM Feb 18, 2020 07:36AM 0.30 496.50 13.08 5.11 4.79 Normal
Feb 4, 2020 10:59AM Feb 11, 2020 07:44AM 1.09 1475.20 16.85 4.88 4.79 Mildly Acidified
Jan 28, 2020 07:34AM Feb 4, 2020 10:54AM 0.00 0.00 Insuffient sample available for field measurements.
Jan 21, 2020 11:30AM Jan 28, 2020 07:28AM 0.00 2453.10 9.06 5.07 4.82 Normal
Jan 14, 2020 01:35PM Jan 21, 2020 11:25AM 0.00 2007.00 5.62 5.01 4.82 Normal
Jan 7, 2020 11:13AM Jan 14, 2020 01:30PM 0.00 683.70 10.44 5.15 4.82 Normal
Dec 31, 2019 12:35PM Jan 7, 2020 11:09AM 0.00 318.90 11.35 4.64 4.79 Moderately Acidified
Dec 24, 2019 07:46AM Dec 31, 2019 12:30PM 0.00 2020.30 4.91 5.10 4.79 Normal
Dec 17, 2019 12:19PM Dec 24, 2019 07:42AM 0.00 151.90 Missing Missing Missing Missing
Dec 10, 2019 08:50AM Dec 17, 2019 12:14PM 0.10 5731.70 10.31 5.28 4.79 Normal
Dec 4, 2019 08:48AM Dec 10, 2019 08:42AM 0.90 1459.30 18.3 5.75 5.02 Normal
Nov 26, 2019 01:42PM Dec 4, 2019 08:45AM 0.70 1424.40 8.66 5.22 5.02 Normal
Nov 19, 2019 08:06AM Nov 26, 2019 01:37PM 0.10 1486.80 4.04 5.54 5.02 Normal
Nov 12, 2019 10:30AM Nov 19, 2019 08:01AM 0.05 527.90 5.45 5.57 5.02 Normal
Nov 5, 2019 09:42AM Nov 12, 2019 10:25AM 0.88 1443.90 16.65 5.33 5.02 Normal
Oct 29, 2019 12:14PM Nov 5, 2019 09:32AM 0.14 1093.10 14.15 5.11 4.91 Normal
Oct 22, 2019 09:49AM Oct 29, 2019 12:10PM 3.77 6681.90 6.67 5.19 4.91 Normal
Oct 15, 2019 02:40PM Oct 22, 2019 09:42AM 1.20 1569.70 41.3 5.33 5.1 Normal
Oct 8, 2019 01:24PM Oct 15, 2019 02:32PM 0.07 113.20 Missing Missing Missing Missing
Oct 1, 2019 12:55PM Oct 8, 2019 01:19PM 0.19 2561.70 8.73 5.63 5.1 Normal
Sep 24, 2019 09:48AM Oct 1, 2019 12:48PM 0.46 880.40 10.48 5.37 5.1 Normal
Sep 17, 2019 02:00PM Sep 24, 2019 09:41AM 0.01 5.90 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