Constituent

Affected aquifers

Calcium

Gulf Coast, Ogallala, Edwards-Trinity Plateau and Seymour

Nitrate

Ogallala, Seymour and Edwards-Trinity Plateau

Chloride

Ogallala Edwards-Trinity Plateau and Hueco-Mesilla Bolson

Potassium

Ogallala

Sodium

All

Sulfate

Ogallala and Edwards-Trinity Plateau