The Denominator is a weekly brief of significant numbers underlying our latest news stories.
More than $73.5 million in funding to improve local air quality is headed for the San Antonio area, with local officials eyeing the funds as their best chance to clean up the air before a critical 2021 deadline.
Biologists and naturalists fear a steady flow of treated sewage will spell disaster for one of the last untouched Hill Country spring-fed streams.
The EPA's decision means stricter regulation of San Antonio's air quality.
Students say public agencies could make data about spills more accessible, increasing the issue's visibility and helping target solutions.
The concentration of hexavalent chromium in the wells is far under the legal limit, but some regulators have pointed to health risks.
An EPA webpage states that hexavalent chromium poses longterm health risks when consumed in levels greater than the drinking water standard over many years.
The Texas Commission for Environmental Quality has classified more than 9,400 miles of streams and 638,000 acres of lakes in Texas as impaired.
San Antonio's ozone levels have decreased in recent years, but they are still higher than a proposed new national standard announced in 2015.
On a Monday morning last November, the front row parking at Noah’s Event Venue was blocked off for public officials from the Texas Commission on Environmental Quality.