Water School

Occasionally, my water has an offensive odor and taste? Why?

The woody, musty, earthy taste that shows up from time to time in our drinking water is normally due to natural causes. The main culprit: algae. When blue-green algae end their lifecycle they emit an oily substance called geosmin, which has a distinctive earthy taste that humans can detect in even small concentrations. While this added flavor in drinking water can be annoying, it poses no health hazard.

While water utilities have long worked to reduce the prevalence of the offensive taste and odor, customers can also have some success by filtering their water. Keeping the water cool also decreases the taste’s intensity.

But the most effective way to improve water’s taste and odor is at the source by reducing the food supply to the algae that creates geosmin. The algae feed on nutrients that wash in from the surrounding watershed. One source of those nutrients is fertilizer that washes into lakes from the lawns of lakeside property owners and others in the watershed. Limiting such fertilizer will reduce the amount of excess that washes into our streams and lakes during heavy rains.




The information provided on this site is intended as background on water within the Brazos River basin. There should be no expectation that this information is all encompassing, complete or in any way examines every aspect of this very complex natural resource.

If you have questions about a post or would like additional information, please contact us or call 888-922-6272.

sanitation chlorine sediment mitigation agricultural monitor hydrilla electricity supply solids possum kingdom water quality medicine reservoirs planning dam bay riparian water planning golden algae organic water plants infection flood pool kayak hunting direct re-use storage canoe oxygen acre-feet precipitation indirect re-use water treatment main stem recreation map lake level watercourse wildlife contaminants spillway agriculture septic system salt quality groundwater wetland hydropower minerals E coli authority inland releases appropriation biosolids brackish runoff water code impound permit limestone estuary industry anaerobic flood control lake corps of engineers gas cfs governance channel streamflow contract lake levels mainstem basin environment consumption water supply meta tag gage jobs allens creek reservoir water clarity tributary costs E. coli subsidence conservation classification beneficial use parasite water cycle canoeing wastewater evaporation landscaping lakes reservoir water fish kill hydrologic cycle sewage fishing USGS marsh filter acre-foot chlorides water use municipal lawn potable mission soil volume golden algea system dissolved solids septic aquifer rights bottled water riverine algae aerobic hydrology clarity use treatment wetlands watershed drought water rights maps emergency use effluent speaker pollutants TCEQ taste fertilizer turbidity lake subwatershed dock fork drinking water measure subsidence district invasive plants drilling corps streamflow electric companies farming habitat Board mgd granbury legislation employment calcium smell salinity gate environmental industrial camping ground water gulf well PAM boating spring stream pharmaceuticals insurance river inundated xeriscape flood surface water rain bed and banks depth sludge climate