Fort Griswold Battlefield State Park, Groton, Connecticut, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
Fort Griswold Battlefield State Park, Groton, Connecticut, United States
AQI Trends: Highest and Lowest
Same Day Analysis (15th July):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 43 of Good air quality, showing improvement over 2023 on the same day.
Day & Night AQI Trend: 14th Jul - 15th Jul 2026
Fort Griswold Battlefield State Park, Groton, Connecticut, United States
5 AM14th Jul 2026
8 PM
4 AM15th Jul 2026
29AQI
12AQI
34AQI
20AQI
In the last 24 hours,
Fort Griswold Battlefield State Park's AQI reached its highest point of 34 at 3 AM during the Night, while the lowest point, 12, was recorded at 10 AM during the Day between 14th Jul and 15th Jul 2026.
Day & Night AQI Trend : Jun - Jul 2026
Fort Griswold Battlefield State Park, Groton, Connecticut, United States
19°C13/27°C
20°C14/26°C
22°C16/30°C
23°C17/28°C
21°C16/28°C
22°C14/30°C
20°C15/26°C
21°C19/23°C
22°C16/30°C
22°C15/31°C
21°C18/25°C
23°C18/31°C
21°C18/28°C
24°C18/32°C
25°C18/32°C
26°C20/34°C
29°C22/38°C
31°C24/39°C
30°C24/37°C
24°C21/28°C
20°C17/24°C
19°C17/22°C
22°C17/29°C
24°C18/32°C
27°C22/33°C
25°C19/31°C
23°C16/32°C
23°C16/31°C
27°C21/34°C
28°C22/35°C
22AQI
18AQI
22AQI
19AQI
2026 Days Vs Air Quality
Fort Griswold Battlefield State Park, Groton, Connecticut, United States
99%
191
1%
2
Total number of days with different AQI categories in last 196 days in 2026 (169 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2026, 99% of 196 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Fort Griswold Battlefield State Park, Groton, Connecticut, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
19AQI (US)
18AQI (US)
24AQI (US)
21AQI (US)
21AQI (US)
45AQI (US)
30AQI (US)
18AQI (US)
25AQI (US)
21AQI (US)
13AQI (US)
12AQI (US)
29AQI (US)
38AQI (US)
33AQI (US)
14AQI (US)
30AQI (US)
49AQI (US)
28AQI (US)
28AQI (US)
27AQI (US)
35AQI (US)
33AQI (US)
46AQI (US)
31AQI (US)
36AQI (US)
30AQI (US)
23AQI (US)
29AQI (US)
45AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
23AQI (US)
21AQI (US)
28AQI (US)
36AQI (US)
25AQI (US)
22AQI (US)
25AQI (US)
24AQI (US)
35AQI (US)
32AQI (US)
33AQI (US)
30AQI (US)
29AQI (US)
29AQI (US)
40AQI (US)
38AQI (US)
26AQI (US)
26AQI (US)
35AQI (US)
30AQI (US)
38AQI (US)
36AQI (US)
28AQI (US)
29AQI (US)
19AQI (US)
19AQI (US)
30AQI (US)
41AQI (US)
22AQI (US)
24AQI (US)
28AQI (US)
37AQI (US)
18AQI (US)
19AQI (US)
15AQI (US)
18AQI (US)
28AQI (US)
32AQI (US)
27AQI (US)
20AQI (US)
32AQI (US)
26AQI (US)
33AQI (US)
28AQI (US)
20AQI (US)
25AQI (US)
29AQI (US)
16AQI (US)
35AQI (US)
33AQI (US)
22AQI (US)
18AQI (US)
30AQI (US)
27AQI (US)
16AQI (US)
19AQI (US)
26AQI (US)
31AQI (US)
33AQI (US)
23AQI (US)
27AQI (US)
27AQI (US)
29AQI (US)
23AQI (US)
34AQI (US)
17AQI (US)
20AQI (US)
32AQI (US)
22AQI (US)
22AQI (US)
24AQI (US)
20AQI (US)
24AQI (US)
27AQI (US)
31AQI (US)
27AQI (US)
23AQI (US)
17AQI (US)
20AQI (US)
14AQI (US)
32AQI (US)
23AQI (US)
19AQI (US)
16AQI (US)
19AQI (US)
25AQI (US)
13AQI (US)
20AQI (US)
23AQI (US)
30AQI (US)
23AQI (US)
26AQI (US)
25AQI (US)
17AQI (US)
28AQI (US)
31AQI (US)
19AQI (US)
19AQI (US)
40AQI (US)
39AQI (US)
50AQI (US)
54AQI (US)
54AQI (US)
49AQI (US)
40AQI (US)
37AQI (US)
41AQI (US)
44AQI (US)
45AQI (US)
19AQI (US)
15AQI (US)
16AQI (US)
16AQI (US)
16AQI (US)
18AQI (US)
23AQI (US)
16AQI (US)
15AQI (US)
17AQI (US)
23AQI (US)
24AQI (US)
14AQI (US)
18AQI (US)
14AQI (US)
18AQI (US)
21AQI (US)
14AQI (US)
14AQI (US)
16AQI (US)
20AQI (US)
24AQI (US)
16AQI (US)
24AQI (US)
15AQI (US)
15AQI (US)
19AQI (US)
14AQI (US)
17AQI (US)
12AQI (US)
12AQI (US)
18AQI (US)
20AQI (US)
15AQI (US)
18AQI (US)
23AQI (US)
20AQI (US)
30AQI (US)
30AQI (US)
22AQI (US)
28AQI (US)
24AQI (US)
12AQI (US)
17AQI (US)
18AQI (US)
16AQI (US)
22AQI (US)
20AQI (US)
19AQI (US)
20AQI (US)
43AQI (US)
28AQI (US)
29AQI (US)
26AQI (US)
24AQI (US)
30AQI (US)
18AQI (US)
23AQI (US)
No. of days
202625AQI (US)
Highest AQI (US) recorded in
May30AQI (US)
Lowest AQI (US) recorded in
June18AQI (US)
202529AQI (US)
Highest AQI (US) recorded in
June40AQI (US)
Lowest AQI (US) recorded in
October21AQI (US)
202424AQI (US)
Highest AQI (US) recorded in
August34AQI (US)
Lowest AQI (US) recorded in
March19AQI (US)
202331AQI (US)
Highest AQI (US) recorded in
June48AQI (US)
Lowest AQI (US) recorded in
November23AQI (US)
202227AQI (US)
Highest AQI (US) recorded in
July35AQI (US)
Lowest AQI (US) recorded in
April22AQI (US)
202130AQI (US)
Highest AQI (US) recorded in
July42AQI (US)
Lowest AQI (US) recorded in
May24AQI (US)
202030AQI (US)
Highest AQI (US) recorded in
July34AQI (US)
Lowest AQI (US) recorded in
September24AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Fort Griswold Battlefield State Park's annual 2026 AQI (US) (25) shows an average percentage change of -11.6% (improved AQI (US)) compared to previous years: 2020 (30), 2021 (30), 2022 (27), 2023 (31), 2024 (24), 2025 (29).