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Peel Service Delivery Areas (SDA)

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Frequently Asked Questions

1. What are Service Delivery Areas (SDAs)?

Service Delivery Areas (SDAs) are geographies intended to support service planning and delivery by providing service providers with data that is relevant to the local geographies they serve. SDAs are comprised of census dissemination areas (the smallest standard geography for census data) and have varying population thresholds for each municipality.

2. How were Service Delivery Areas (SDAs) identified?

SDAs were primarily drafted based on homogeneous socioeconomic census characteristics and broad-based consultations with service providers across Peel Region. Population thresholds (Mississauga – 20K, Brampton – 15 K and Caledon – 5K), as well as, natural, street, and dissemination area (DA) boundaries were also used.

3. How many Service Delivery Areas (SDAs) have been identified for Peel Region?

A total of 71 SDAs were identified: 32 SDAs in Mississauga, 30 SDAs in Brampton and 9 SDAs in Caledon.

4. What is the benefit of having Service Delivery Areas (SDAs)?

Service Delivery Areas (SDAs) will assist service delivery planning. SDA Profiles have been created to provide service providers with data that is relevant to the local geographies they serve.

5. Why do some figures not add-up?

a) Census Rounding:

To maximize privacy, Statistics Canada rounds data to multiples of five or ten. However, figures on population counts are not rounded since they do not provide information on the characteristics of these populations.

b) Twenty percent Sample Data:

Not all data is collected from the entire population. Some questions, such as those related to income, are asked to only 20 percent of the population (Census long questionnaire) and used to estimate values for the entire population.

6. Warning for Top 5 Tables

a) Threshold:

The top five variables within a given table are determined by their ranking within Peel, not necessarily a particular SDA. If you wish to obtain the top five for a SDA, please download the corresponding Fact Sheet.

b) Comparability:

As the top five in a census year may vary to another census year, some variables may not be comparable. The Peel Data Centre provides trend analysis where possible under the 2001-2006 Change Tables. If you wish to retrieve a full set of figures, contact us.

7. Reading the Percent Change Table Correctly:

This table summarises two distinct types of changes for 2001-2006.

a) Percent Change:

When dealing with absolute numbers, Percent Change Table displays percent changes
(B-A)/A, where A = Census Data Year 2001 and B = Census Data Year 2006. For example, a percent change is used to compare the change in number of immigrants in 2001 and 2006.

b) Change in Proportion:

When dealing with proportions (percentages), the Percent Change Table displays a simple change in proportion (B-A) as opposed to a percent change (B-A)/A. For example, a change in proportion is used to compare the change in the proportions of immigrants out of the total population in 2001 and 2006.

8. What is the difference between cells containing zero (0) and those with a hyphen (–)?

a) Zero (0):

An absence of a given characteristic. For example, a zero under category “Seniors 65+” means there were no seniors in that SDA.

b) Hyphen (–):

Missing data that should not be interpreted as an absence of a given characteristic.

Hyphens also appear in percent change and/or change in proportions whenever the denominator was zero. Hyphen also applies to 2006 variables that changed in definition since the 2001 census, or were not reported on in the 2001 census and could not have percentage change (from 2001-2006) calculated. For example, if in 2001 there were zero immigrants in an area, and in 2006 there were 15, the percent change will be shown by a hyphen (–), as you can’t divide by zero.

9. Where do I find complete figures that explain percentage change?

When analyzing figures for percentage change, please consult the 2001 and 2006 tables for full figures. If the figures you are looking for are not present, contact us to obtain additional information.

10. Population Methodology Differences

The methodology used for 2001 and 2006 SDA total population figures differs slightly due to technical procedures by Statistics Canada. 2001 Census SDA data is estimated using 20% sample data whereas 2006 Census SDA was estimated based on 100% data population counts by aggregating individual dissemination areas. Both data samples are subject to rounding and should be used with caution.

As such, 2001 total population will be slightly lower, whereas 2006 data will be more accurate. Hence, population growth rates displayed in the 2001-2006 Change tables should also be used with caution as they may reflect a marginally higher growth rate.

Two SDAs encountered suppression at the dissemination area level and reflect lower population figures. The estimated total population figures for these three SDAs are:

  • SDA B023: 13,260.
  • SDA M028: 16,665.

11. What is the Early Development Instrument (EDI)?

The Early Development Instrument (EDI) is a teacher-completed instrument which measures children’s readiness to learn at school in five domains: physical health and well-being; social knowledge and competence; emotional health/maturity; language and cognitive development; and general knowledge and communication skills.

Children who score below the 10th percentile in one or more EDI domains are considered to be “vulnerable”. These children may be most vulnerable to the challenges in starting school, which could impact their achievement of school success.

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Peel Data Centre
Region of Peel
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Brampton, ON, L6T 4B9