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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:
Sep 2, 2014 07:00AM Sep 9, 2014 02:10PM 0.00 1147.00 4.7 4.8 5.05 Mildly Acidified
Aug 26, 2014 08:30AM Sep 2, 2014 07:00AM 0.00 68.60 Insuffient sample available for field measurements.
Aug 19, 2014 03:30PM Aug 26, 2014 08:30AM 0.09 87.10 14.02 5.6 4.8 Normal
Aug 12, 2014 05:00PM Aug 19, 2014 03:30PM 3.21 5252.00 2.32 4.95 4.9 Mildly Acidified
Aug 5, 2014 09:00AM Aug 12, 2014 05:00PM 0.00 4882.00 9.67 4.58 4.7 Moderately Acidified
Jul 29, 2014 09:00AM Aug 5, 2014 08:59AM 0.00 890.90 8.07 4.65 4.95 Moderately Acidified
Jul 22, 2014 08:30AM Jul 29, 2014 11:30AM 0.00 5305.50 5.71 4.55 4.9 Moderately Acidified
Jul 15, 2014 09:30AM Jul 22, 2014 08:30AM 0.00 2535.10 5.02 4.7 4.8 Mildly Acidified
Jul 8, 2014 07:45AM Jul 15, 2014 09:30AM 0.00 243.00 13.4 4.6 5.0 Moderately Acidified
Jul 1, 2014 06:30AM Jul 8, 2014 07:45AM 0.00 2788.00 5.46 4.71 4.82 Mildly Acidified
Jun 24, 2014 01:30PM Jul 1, 2014 06:30AM 0.00 2114.80 4.13 5.08 4.85 Normal
Jun 17, 2014 03:15PM Jun 24, 2014 01:30PM 0.00 255.30 13.68 4.52 4.8 Moderately Acidified
Jun 10, 2014 06:45AM Jun 17, 2014 03:15PM 0.00 2293.70 9.79 4.68 5.0 Moderately Acidified
Jun 3, 2014 09:30AM Jun 10, 2014 06:45AM 0.00 31.20 Insuffient sample available for field measurements.
May 27, 2014 03:30PM Jun 3, 2014 09:30AM 0.00 1183.10 5.61 4.9 4.9 Mildly Acidified
May 20, 2014 08:30AM May 27, 2014 03:30PM 0.00 1462.80 6.01 5.6 4.88 Normal
May 13, 2014 07:15AM May 20, 2014 08:30AM 0.00 2027.00 Missing 4.8 4.85 Mildly Acidified
May 6, 2014 07:30AM May 13, 2014 07:15AM 0.13 119.60 Missing 4.54 5.0 Moderately Acidified
Apr 29, 2014 12:30PM May 6, 2014 07:30AM 0.00 2330.20 Missing 4.95 4.95 Mildly Acidified
Apr 22, 2014 07:05AM Apr 29, 2014 12:30PM 0.48 525.70 Missing 4.71 4.85 Mildly Acidified
Apr 15, 2014 06:30AM Apr 22, 2014 07:05AM 0.00 1188.60 Missing 5.23 5.05 Normal
Apr 8, 2014 03:30PM Apr 15, 2014 06:30AM 0.00 355.20 Missing 4.98 5.05 Mildly Acidified
Apr 1, 2014 04:15PM Apr 8, 2014 03:30PM 0.00 3051.60 Missing 5.1 4.85 Normal
Mar 25, 2014 11:30AM Apr 1, 2014 04:15PM 0.00 1828.30 3.82 4.85 5.2 Mildly Acidified
Mar 18, 2014 09:00AM Mar 25, 2014 11:30AM 0.00 1810.00 4.39 4.93 4.76 Mildly Acidified
Mar 11, 2014 12:15PM Mar 18, 2014 09:00AM 0.00 2356.10 11.16 4.60 4.70 Moderately Acidified

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