Environmental watch
What's in the air, water, and ground around here.
Live environmental OSINT for your community, pulled from public federal feeds — the EPA, the USGS, and the National Weather Service. No account, no tracking; every number links back to its public source. Auto-refreshes about every 30 minutes.
🌎 Environmental watch
Live public data for San Marcos · updated 7 d ago · showing last good readingAir quality
43GoodUS AQI
PM2.5 8μg/m³PM10 11μg/m³Ozone 77μg/m³NO₂ 2μg/m³
Water monitoring
San Marcos Rv At San Marcos, Tx · 1 km away
110 ft3/sStreamflow
3.74 ftGage height
Active alerts
- ModerateHeat Advisory
Earthquakes · 30 days
M2.5strongest within 250 km
13 km SE of Pearsall, Texas
2 quakes ≥ M2.5
Sources: Open-Meteo Air Quality, USGS Water Services, National Weather Service, USGS Earthquake Catalog, EPA National Priorities List. All public, no personal data.
Air quality — full readout
US Air Quality Index 43 (Good). Observed Aug 24, 11:00 AM.
8.4 μg/m³PM2.5
11.4 μg/m³PM10
77.0 μg/m³Ozone
1.9 μg/m³NO₂
1.4 μg/m³SO₂
103.0 μg/m³CO
Source: Open-Meteo Air Quality ↗
Water monitoring — nearest site
San Marcos Rv At San Marcos, Tx · 1 km away · 89 sites in range
110 ft3/sStreamflow · Aug 24, 3:45 PM
3.74 ftGage height · Aug 24, 3:45 PM
Source: USGS Water Services ↗
Active weather alerts1
ModerateHeat Advisoryuntil Aug 27, 12:00 AM
Heat Advisory issued August 23 at 7:11PM CDT until August 26 at 7:00PM CDT by NWS Austin/San Antonio TX
Hays; Bexar; Comal; Guadalupe; Atascosa; Wilson; Karnes; De Witt
Source: National Weather Service ↗
Earthquakes — last 30 days2
M2.5↗M2.5↗
13 km SE of Pearsall, Texas
Aug 13, 11:40 PM · 156 km away
13 km ESE of Pearsall, Texas
Aug 3, 5:16 PM · 153 km away
Source: USGS Earthquake Catalog ↗
Superfund sites
56 active EPA Superfund (National Priorities List) sites in TX of 70 ever listed.
Eldorado Chemical Co., Inc.
Live Oak · NPL Site · 53 km away
The state’s energy ledger
What TX’s grid runs on, its EV fleet and charging network, and where its mandate stands — from the national Energy Ledger.
Open the TX energy dossier →Snapshot generated Aug 24, 4:43 PM (showing last good reading while refreshing). All data is public and carries no personal information.