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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:
Sep 13, 2022 08:55AM Sep 20, 2022 09:05AM 2.15 2732.50 6.04 5.71 4.95 Normal
Sep 6, 2022 08:59AM Sep 13, 2022 08:50AM 0.02 83.70 Missing Missing Missing Missing
Aug 30, 2022 09:10AM Sep 6, 2022 08:54AM 1.40 2029.30 7.9 5.91 4.95 Normal
Aug 23, 2022 07:17AM Aug 30, 2022 09:05AM 0.45 792.10 9.53 5.59 4.95 Normal
Aug 16, 2022 07:32AM Aug 23, 2022 07:12AM 1.07 850.60 7.12 5.60 4.95 Normal
Aug 9, 2022 07:43AM Aug 16, 2022 07:27AM 0.07 137.30 13.1 5.57 4.95 Normal
Aug 2, 2022 09:49AM Aug 9, 2022 07:38AM 0.32 505.50 13.90 5.60 4.94 Normal
Jul 26, 2022 08:09AM Aug 2, 2022 09:44AM 0.82 1374.80 11.2 5.54 4.94 Normal
Jul 19, 2022 08:15AM Jul 26, 2022 08:04AM 0.83 1388.60 8.94 5.58 5.00 Normal
Jul 12, 2022 08:45AM Jul 19, 2022 08:10AM 0.72 1114.10 10.82 5.38 5.00 Normal
Jul 5, 2022 06:20AM Jul 12, 2022 08:40AM 0.37 518.20 12.85 5.52 5.02 Normal
Jun 29, 2022 06:58AM Jul 5, 2022 06:15AM 0.03 43.20 Insuffient sample available for field measurements.
Jun 21, 2022 11:10AM Jun 29, 2022 06:53AM 0.22 369.20 13.75 5.44 5.02 Normal
Jun 14, 2022 08:18AM Jun 21, 2022 11:05AM 0.41 667.20 12.62 5.76 5.00 Normal
Jun 7, 2022 10:44AM Jun 14, 2022 08:13AM 1.31 1908.70 14.54 5.63 5.00 Normal
May 31, 2022 01:28PM Jun 7, 2022 10:39AM 0.22 317.70 6.73 5.85 5.03 Normal
May 24, 2022 07:15AM May 31, 2022 01:23PM 0.04 35.10 Insuffient sample available for field measurements.
May 17, 2022 08:18AM May 24, 2022 07:10AM 0.00 1014.30 9.83 5.60 5.03 Normal
May 10, 2022 06:28AM May 17, 2022 08:13AM 0.00 253.50 Missing Missing Missing Missing
May 3, 2022 06:55AM May 10, 2022 06:24AM 0.51 597.20 10.57 5.61 5.01 Normal
Apr 26, 2022 06:12AM May 3, 2022 06:50AM 0.82 1010.20 11.53 5.43 5.01 Normal
Apr 20, 2022 07:17AM Apr 26, 2022 06:08AM 0.01 0.00 Insuffient sample available for field measurements.
Apr 12, 2022 06:29AM Apr 20, 2022 07:11AM 1.67 1450.10 11.40 5.74 5.00 Normal
Apr 5, 2022 06:44AM Apr 12, 2022 06:24AM 2.18 3755.50 11.43 5.52 5.00 Normal
Mar 29, 2022 08:20AM Apr 5, 2022 06:39AM 0.61 675.00 16.17 5.66 4.97 Normal
Mar 22, 2022 08:35AM Mar 29, 2022 08:15AM 0.64 811.70 6.59 5.80 4.97 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