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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:
Jun 17, 2020 09:15AM Jun 24, 2020 10:00AM 0.00 0.00 Insuffient sample available for field measurements.
Jun 10, 2020 09:15AM Jun 17, 2020 02:30PM 0.00 1.40 Insuffient sample available for field measurements.
Jun 3, 2020 12:45PM Jun 16, 2020 08:59AM 0.89 1543.50 19.88 5.24 7.74 Normal
May 27, 2020 02:45PM Jun 3, 2020 12:45PM 0.14 187.50 8.42 5.58 4.82 Normal
May 19, 2020 07:15AM May 27, 2020 02:45PM 0.00 0.00 Insuffient sample available for field measurements.
May 13, 2020 03:15PM May 19, 2020 07:15AM 0.76 1341.10 14.7 5.08 4.81 Normal
May 5, 2020 09:30AM May 13, 2020 03:15PM 0.90 1356.40 7.98 5.4 4.87 Normal
Apr 29, 2020 02:30PM May 5, 2020 09:30AM 1.42 2454.50 30.88 5.69 4.97 Normal
Apr 22, 2020 08:30AM Apr 29, 2020 02:30PM 0.70 1177.40 4.90 5.35 4.90 Normal
Apr 14, 2020 10:15AM Apr 22, 2020 08:30AM 0.30 537.70 13.62 5.49 4.88 Normal
Mar 31, 2020 02:00PM Apr 7, 2020 11:30AM 1.34 1.24 Insuffient sample available for field measurements.
Mar 24, 2020 05:15AM Mar 31, 2020 02:00PM 0.76 0.72 Insuffient sample available for field measurements.
Mar 17, 2020 08:15AM Mar 24, 2020 05:15AM 0.85 0.04 Insuffient sample available for field measurements.
Mar 10, 2020 08:30AM Mar 17, 2020 08:15AM 1.13 0.00 Insuffient sample available for field measurements.
Mar 3, 2020 09:45AM Mar 10, 2020 08:30AM 0.27 445.30 9.18 5.12 4.83 Normal
Feb 25, 2020 10:15AM Mar 3, 2020 09:45AM 1.42 2540.30 14.76 5.64 4.91 Normal
Feb 19, 2020 10:30AM Feb 25, 2020 10:15AM 0.00 0.00 Insuffient sample available for field measurements.
Feb 11, 2020 10:30AM Feb 18, 2020 11:00AM 0.97 0.00 Insuffient sample available for field measurements.
Feb 5, 2020 01:15PM Feb 12, 2020 10:30AM 1.70 0.00 Insuffient sample available for field measurements.
Jan 28, 2020 02:00PM Feb 5, 2020 01:15PM 0.04 0.00 Insuffient sample available for field measurements.
Jan 22, 2020 01:00PM Jan 28, 2020 02:00PM 8.91 1476.60 6.08 5.13 4.85 Normal
Jan 15, 2020 12:00PM Jan 22, 2020 01:00PM 10.97 0.00 Insuffient sample available for field measurements.
Jan 7, 2020 02:45PM Jan 15, 2020 12:00PM 8.81 1928.90 4.03 5.51 4.85 Normal
Dec 31, 2019 01:45PM Jan 7, 2020 02:45PM 9.53 164.90 8.34 5.0 4.84 Normal
Dec 23, 2019 01:15PM Dec 31, 2019 01:45PM 0.02 34.00 Insuffient sample available for field measurements.
Dec 17, 2019 09:30AM Dec 23, 2019 01:15PM 0.06 -0.30 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