Color-coded County Maps:
Overview:
To better track the change in COVID-19 community spread week over week, the Indiana Department of
Health is introducing a new county weekly scoring map. This map will assign each county a color based
on the average of scores assigned for the number of weekly cases per 100,000 and its seven-day positivity
rate. The overall county score will help guide the Indiana Department of Health, local partners, and
Hoosiers as they make the best decisions possible to protect their communities and limit the spread of
COVID-19.
The two metrics used to calculate the weekly county status score are described in detail in Table 1.
Table 1: Key Metrics & Thresholds
Primary
Geography
Definition
Metrics
7-day moving average of
7-Day
the all tests positivity rate,
Positivity
calculated by taking the
County
Rate (All
total number of positive
Tests)
tests and dividing by total
tests administered
Total weekly cases in a
Weekly Cases
county divided by the
Per 100,000
County
county population and
Residents
multiplied by 100,000

Blue
(0 Points)

Yellow
(1 Point)

Orange
(2 Points)

Less than 5%

5.0-9.9%

10-14.9%

Less than 10
new cases per
100,000

10 to 99
new cases

100 to
199 new
cases

Red
(3 Points)
15% or
greater

200 or
more new
cases

Weekly Score Calculation:
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The weekly county status scores and maps are updated once a week on Wednesdays at 12 p.m.
The weekly update reflects data from the previous Monday through Sunday.
On Mondays, the Indiana Department of Health will calculate the weekly scores for the metrics
above. To calculate test positivity rate, IDOH will utilize Monday’s 7-day average for the all tests
positivity rate for each county. Please note that this calculation is lagged by 6 days to ensure
complete testing information has been received.
To calculate each county’s new weekly cases, IDOH will identify all new positive cases that were
collected and resulted in the period from Monday through Sunday. This number is then divided
by each county’s total county population and multiplied by 100,000.
After calculating the individual scores for each of the metrics, the two scores are averaged
together to determine the total county score. An example of this calculation is described in detail
in Table 2.
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The ranges that determine the overall county color are as follows:
o Blue Zone = 0 and 0.5
o Yellow Zone = 1.0 and 1.5
o Orange Zone = 2.0 and 2.5
o Red Zone = 3.0
Some counties may have a
symbol on the weekly update. This symbol signifies that the county
has been flagged due to a large number of cases being attributable to congregate settings. If a
county has this symbol, more information will be available by hovering over the county on the
scoring map.

Table 2: Example Scoring
County Name: Example Co.
Metric 1: 7-Day Positivity
Rate (All Tests)
Metric 2: Weekly Cases Per
100,000 Residents

Weekly Overall Score

Value

Zone

Points

7.5%

Yellow

1

175

Orange

2

Yellow

3 𝑃𝑜𝑖𝑛𝑡𝑠
= 1.5 𝑂𝑣𝑒𝑟𝑎𝑙𝑙 𝑃𝑜𝑖𝑛𝑡𝑠
2 𝑀𝑒𝑡𝑟𝑖𝑐𝑠

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