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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: ME02 - Bridgton - Upper Ridge Road [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:
Oct 4, 2022 03:00PM Oct 10, 2022 04:00PM 0.00 0.00 Insuffient sample available for field measurements.
Sep 27, 2022 04:00PM Oct 4, 2022 03:30PM 0.00 0.00 Insuffient sample available for field measurements.
Sep 20, 2022 03:15PM Sep 27, 2022 03:15PM 1.59 1.53 Insuffient sample available for field measurements.
Sep 13, 2022 03:30PM Sep 20, 2022 03:30PM 2.20 2.33 Insuffient sample available for field measurements.
Sep 6, 2022 02:30PM Sep 13, 2022 02:30PM 0.01 0.00 Insuffient sample available for field measurements.
Aug 30, 2022 02:30PM Sep 7, 2022 07:30AM 2.75 5070.20 2.20 5.29 5.03 Normal
Aug 23, 2022 02:15PM Aug 30, 2022 02:15PM 0.80 1407.40 2.83 5.18 5.06 Normal
Aug 16, 2022 01:00PM Aug 23, 2022 01:00PM 1.89 3034.80 1.57 5.55 5.06 Normal
Aug 9, 2022 02:30PM Aug 16, 2022 02:30PM 0.30 506.40 2.88 5.45 5.09 Normal
Aug 2, 2022 02:30PM Aug 9, 2022 03:15PM 0.77 1336.20 3.93 5.32 5.09 Normal
Jul 26, 2022 02:15PM Aug 2, 2022 02:15PM 0.35 623.10 5.23 5.18 5.03 Normal
Jul 19, 2022 02:30PM Jul 26, 2022 02:30PM 0.72 1217.40 4.66 5.24 5.06 Normal
Jul 12, 2022 02:15PM Jul 19, 2022 02:30PM 0.99 1572.40 4.49 5.33 5.06 Normal
Jul 5, 2022 02:45PM Jul 12, 2022 02:45PM 0.51 797.00 4.28 5.56 5.05 Normal
Jun 28, 2022 03:30PM Jul 5, 2022 03:30PM 0.08 100.00 0.44 5.72 5.03 Normal
Jun 21, 2022 02:45PM Jun 28, 2022 02:45PM 0.10 141.00 0.39 5.12 5.06 Normal
Jun 14, 2022 02:05PM Jun 14, 2022 02:06PM 0.04 11.40 Insuffient sample available for field measurements.
Jun 14, 2022 01:15PM Jun 21, 2022 01:15PM 0.33 568.00 1.79 5.72 5.09 Normal
Jun 7, 2022 01:00PM Jun 14, 2022 02:45PM 1.46 2501.20 0.91 5.87 5.03 Normal
May 31, 2022 03:30PM Jun 7, 2022 01:00PM 0.40 626.60 0.83 5.52 5.04 Normal
May 24, 2022 02:45PM May 31, 2022 03:30PM 0.18 322.80 0.647 5.20 5.09 Normal
May 18, 2022 08:15AM May 24, 2022 03:30PM 0.39 441.60 0.627 5.64 5.04 Normal
May 10, 2022 01:00PM May 18, 2022 08:15AM 0.89 1504.40 0.8 5.08 5.36 Normal
May 3, 2022 02:00PM May 10, 2022 01:50PM 0.74 1139.20 0.76 5.67 5.02 Normal
Apr 26, 2022 03:30PM May 2, 2022 03:30PM 0.44 622.00 0.79 5.24 5.04 Normal
Apr 26, 2022 12:15PM Jun 14, 2022 02:05PM 0.04 11.40 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