princeedwardisland-ca/od0004-pesticide-analysis-for-drinking-water-iy5f-uq43

  • drinking water
  • monitoring
  • pesticide

OD0004 Pesticide Analysis For Drinking Water

OD0004 Pesticide Analysis For Drinking Water

This data set provides pesticide sample analyses results for drinking water samples for the province’s Pesticide Monitoring Program.

Over 100 wells are monitored annually, with samples being collected in drinking water wells of private homes, schools, municipalities, and seniors’ housing facilities. Sampling of the wells is conducted each January/February by Departmental staff. The samples are sent to a laboratory in New Brunswick for analysis. The purpose of the program is to monitor the environment for the presence of pesticide residues.

To create a long-term record of pesticide detections in drinking water, the same sites are sampled each year. Individual site locations are not listed to respect the privacy of the individuals involved, as this is a voluntary program for all participants. Public buildings (e.g., schools and seniors’ housing) are identified. The non-public building sites are listed as letter/number combinations (e.g. A1, AA, FFF, etc.) The designations remain consistent for each site from year to year.

The dataset also includes chemistry analyses for the sites. Additional water samples were collected at the same time as the pesticide sampling, which were then analyzed at the PEI Analytical Laboratory for various chemistry parameters. Users should note that the parameters analysed and the lab detection limits for these chemistry samples/results may vary from year to year. Chemistry sampling ceased after the 2013 sampling year.

Results with a "<" represent values below the lab's reporting limit. Such results do not confirm the presence nor the absence of a pesticide compound below that level.

Safe Drinking Water Limits (Pesticides)

The pesticide data also includes a safe drinking water limit (if one is available). The four sources of safe drinking water limits are listed below:

Canadian Drinking Water Quality Guideline Value

Health Canada Guidance Value

USEPA Pesticide Tolerance Level

Guidance value not available, Health Canada has indicated detected levels are below levels of concern

Only compounds that have been detected through the monitoring program or which have a Canadian Drinking Water Guideline Value have a safe drinking water limit value listed.

Some of the guideline values have been converted from the published units of ug/L to ng/ml in order to compare the guideline values to the results.

Health Canada provides The Guidelines for Canadian Drinking Water Quality (link is external).

Chemistry Samples

The chemistry results were compiled from three different databases, and may utilize different parameters and units/limits:

results previous to 2009

results between 2010 and 2012

results after June 2012

Columns

NameSocrata field nameColumn name in sgr mountData typeDescription
Date Sampleddate_sampleddate_sampledCalendar date
CommunitycommunitycommunityText
SitesitesiteText
Sampling Yearsampling_yearsampling_yearText
Yearyear_sampledyear_sampledNumber
ParameterparameterparameterText
Concentration Less Than or Equal Toconcentration_less_than_or_equal_toconcentration_less_than_or_equal_toNumber
ConcentrationconcentrationconcentrationText
Monthmonth_sampledmonth_sampledNumber
Analysis Typeanalysis_typeanalysis_typeText
Safe Drinking Water Limit Source (Pesticide Analyses)safe_drinking_water_limit_source_pesticide_analysessafe_drinking_water_limit_source_pesticide_analysesText
Date as Textdate_as_textdate_as_textText
Safe Drinking Water Limit (pesticide Analyses)safe_drinking_water_limit_pesticide_analysessafe_drinking_water_limit_pesticide_analysesNumber
UnitsunitsunitsText

Upstream Metadata