SmogRank / South Africa / Western Cape / Riversdale

Riversdale, month by month

Riversdale has a measured daily mean on 29 days since 28 August 2026.

Every month since 2026

2026too few days for a mean (a year needs 200)29 days measured
JanFebMarAprMayJunJulAug4 daysSep13 daysOct32#2,003
Each square is a month's mean PM2.5 in US AQI from Riversdale's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Riversdale marked; each year, the year's. A dashed square is the running month, so far.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

2 months
MonthWhy
Sep 202613 of 30 days measured; a month needs 21. The others: 7 with no readings from the monitor, 10 with readings for part of the day (a day needs 18 hours).
Aug 20264 of 31 days measured; a month needs 22.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Riversdale's worst days

DayUS AQI
26 Sept 2026 6014.1 µg/m³
25 Sept 2026 5712.3 µg/m³
24 Sept 2026 5410.5 µg/m³
9 Sept 2026 529.8 µg/m³
29 Aug 2026 529.4 µg/m³
28 Aug 2026 509.0 µg/m³
22 Sept 2026 437.8 µg/m³
1 Oct 2026 437.8 µg/m³
10 Oct 2026 427.5 µg/m³
12 Oct 2026 407.2 µg/m³

Daily means, the highest since 28 Aug 2026; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Riversdale, South Africa, 28 Aug 2026 – 12 Oct 2026. Monitor data from SAAQIS (South Africa's Department of Forestry, Fisheries and the Environment) via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/za/riversdale/history (accessed 12 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Riversdale now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).