The following represents my findings on Health. The following is not “known” nor is it necessarily exactly correct, but I’ve done my best. First, the maximum city health rating is the percentage of your population that is currently receiving coverage from a CLINIC as follows (note that are the following are rounded numbers, whereby 0.44 = 0 and 0.45 is rounded up to 1.
Level Percentage
Appalling 0
Terrible 1-2
Bad 3-6
Poor 7-20
Below Avg 20-34
Average 34-48
Good 48-60
Very Good 60-74
Excellent 74-87
Almost Perfect 87-99
Perfect 100
While your maximum level is determined by your coverage, your current level can only be (with some low number exceptions) modified by one “tick” up or down at the end of each month. Each tick is about 14/5 percent as it takes 5 FULL months to pass through each level above bad. For example, your city is avg in Dec but has perfect coverage. On January 1st your cities health increases to Good and will stay good for five full months until June 1st when the rating becomes Very Good. Appalling and Perfect contain only one tick while Terrible has two ticks and Bad has 3 ticks (it takes 3 full months to move from the lowest Bad up to Poor) – each tick at these extremes is only about 1 percent.
Rats
When Rats are found in your water, city health is dramatically affected on a sliding scale. The better your health rating before the rats hit, the greater the fall as follows:
Starting Health % Health % after
(before rats)
100 -- > 35
90 -- > 30
80 -- > 25
75 -- > 21
65 -- > 15
58 -- > 13
50 -- > 10
41 -- > 7.5
36 -- > 4
30 -- > 1
25 -- > 0
There is also an additional penalty after rats if your city recently needed fumigation – so it is possible that you could see the rating go from Very Good (65%) to Bad (5%) after rats if your city recently had disease. note that Births and deaths are calculated based on the health rating as of Jan 1st, not on dec 31st.
Hope this is useful to some.
[This message has been edited by Naghite (edited 03-20-2005 @ 05:55 PM).]