New Castle Northwest, Pennsylvania Air Quality
New Castle Northwest has a median AQI of 24, earning an air quality grade of A+ — excellent air quality that ranks better than 93% of US cities. Air quality has been improving steadily over the past decade, a positive sign for residents. Ground-level ozone is the primary concern, typically peaking on warm sunny days due to vehicle and industrial emissions. In 2024, New Castle Northwest recorded 31 good air quality days (100% of monitored days).
Population: 1,223 • County: Lawrence
Loading AQI…
Quick Facts
| Current AQI | 8 — Good |
| Air Quality Grade | A+ |
| Median AQI (2024) | 24 |
| vs. U.S. Cities | Better than 93% |
| Primary Pollutant | Ozone |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | ↑ Improving |
| Data Source | EPA AirNow |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 30 Days
Current Pollutant Levels
Real-time data from EPA AirNow
AQI Trend (10 Years)
Air Quality Days by Year
2024 Air Quality Summary
Primary Pollutant Days (2024)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About New Castle Northwest Air Quality
What is the air quality in New Castle Northwest today?
The current AQI in New Castle Northwest is 8, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in New Castle Northwest getting better or worse?
Air quality in New Castle Northwest has been improving over the past decade. The median AQI dropped from 33 in 2016 to 24 in 2024.
What is the most common air pollutant in New Castle Northwest?
Ozone is the primary air pollutant in New Castle Northwest, responsible for the most air quality-impacted days in 2024. Ground-level ozone forms when sunlight reacts with vehicle and industrial emissions on warm days.
How many unhealthy air days does New Castle Northwest have per year?
In 2024, New Castle Northwest had 0 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 31 good days and 0 moderate days out of 31 days monitored.
What air quality grade does New Castle Northwest receive?
New Castle Northwest receives an air quality grade of A+, placing it better than 93% of US cities. This grade is based on a median AQI of 24 for 2024, derived from EPA monitoring data.
Air Quality Grade
Better than 93% of US cities
Nearby Cities
Get AQI Alerts
Receive notifications when air quality changes in New Castle Northwest
National Rankings
See how New Castle Northwest compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for New Castle Northwest
Based on your area's air quality (median AQI: 24), we recommend these air purifiers to help protect your health indoors.
RabbitAir MinusA2
Stylish wall-mountable design with customizable artwork panels.
- ✓Adequate for room size
- ✓Recommended for your air quality
We may earn a commission from purchases
Other Great Options
Molekule Air Pro
Commercial-grade with patented PECO technology for destroying pollutants.
Blueair Blue Pure 211+
High performance for large rooms with simple operation.
Dyson Pure Cool TP04
Premium all-in-one air purifier and fan with advanced features.
Not sure which air purifier is right for you?
Learn more about different types of air purifiers and how to choose the best one for your needs.
Read our complete buying guide →