Air quality in Peterborough, New Hampshire, United States of America today

Mr. Duck’s Air Quality Score

Good air today for Peterborough, Ontario, Canada

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Peterborough, New Hampshire is rated as Good today. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 2.9 and a PM10 reference value of 6.0, based on ten valid observations collected via OpenAQ.

These values reflect the current assessment for the city. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

Peterborough’s OpenAQ feed includes data for five common air‑quality pollutants – carbon monoxide (CO), ozone (O₃), particulate matter up to 10 µm (PM10), fine particulate matter up to 2.5 µm (PM₂.₅) and sulfur dioxide (SO₂). All of these measurements come from a single monitoring location, Miller State Park, which supplies ten recent rows of data across the five pollutants. The most recent timestamp for every pollutant is 2026‑02‑10 23:00 UTC, meaning the dataset has been refreshed within the last 30 days and reflects fairly current conditions for this site.

The recorded values show a modest spread for each compound. CO varies between 0.22 ppm and 0.30 ppm, with a median of 0.26 ppm; ozone ranges from 0.037 ppm to 0.045 ppm, centering around 0.041 ppm. Particulate matter is measured in micrograms per cubic metre: PM10 values sit between 3.0 and 6.0 µg/m³ (median 4.5 µg/m³), while PM₂.₅ spans from essentially zero up to 2.9 µg/m³, with a typical value of about 1.45 µg/m³. Sulfur dioxide is the lowest‑concentration gas, recorded from 0.0005 ppm to 0.001 ppm and averaging roughly 0.00075 ppm.

Because only one monitoring station contributes data, the picture presented here reflects conditions at Miller State Park rather than the entire city. The dataset’s freshness is good – every pollutant has a last‑updated time within the past month – but the limited spatial coverage means that air quality can differ in other neighborhoods or at different times of day. Users should keep in mind that these numbers represent a snapshot from a single point source and may not capture localized variations across Peterborough.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

The data shown reflects ten valid measurements and is updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 23:00 UTC. This snapshot provides a brief overview of air quality in Peterborough, New Hampshire; conditions can differ across neighborhoods and change throughout the day, so local variations may not be captured by these aggregate values.

OpenAQ station rows