Carbon Dioxide

Carbon dioxide is a gas that dissolves in water from air and underground sources. It can make water slightly acidic but is not harmful at typical levels in drinking water.

Carbon dioxide naturally enters water from the air and underground sources like decomposing organic matter and volcanic activity. It readily dissolves, forming carbonic acid which slightly lowers water pH. While not typically a health concern in drinking water, high levels can affect taste and potentially corrode plumbing. Water treatment plants monitor CO2 indirectly through pH testing and may adjust acidity if needed. The presence of CO2 in water is a normal part of the natural carbon cycle.

People affected
2.6M
Utilities with this contaminant
161
States with this contaminant
5

Utilities with the highest levels of this contaminant

UtilityService AreasLevelPopulation Served
Eufaula Water Works
Eufaula, AL

159.000 ppm

17,958

Loachapoka Water Authority
Loachapoka, AL

60.950 ppm

12,657

Prattville (Water Works Board Of)
Prattville, AL

49.000 ppm

45,444

Ne Morgan Co Water And Sewer Authority
Somerville, AL

46.600 ppm

25,227

Dekalb-Jackson Water Supply District
Jackson County, AL

37.600 ppm

15,531

Florence (Water Department), City Of
Florence, AL

37.200 ppm

77,766

Decatur (Municipal Utilities Board Of)
Decatur, AL

37.000 ppm

77,100

Opelika Utilities
Opelika, AL

28.850 ppm

45,621

Scottsboro Water Works
Scottsboro, AL

25.700 ppm

22,119

Cherokee County Water Authority
Piedmont, AL

23.500 ppm

11,013