Fremont County Water Report

Fremont County's water systems carry a failing grade, scoring 39.1 out of 100. Over the past five years, EPA SDWIS records 18 health-based violations — a pattern that public water utilities are required to disclose and correct.

Under the Clean Water Act §303(d), EPA ATTAINS tracks whether waterways meet quality standards for drinking, recreation, and aquatic life (reporting cycle: 2022). A notable 28.6% of assessed waterways carry an impairment designation (46 of 161 water bodies) across Fremont County's watersheds. The leading impairment causes are escherichia coli (e. coli) and zinc. Impairment does not mean tap water is unsafe — it measures ambient waterway conditions upstream of treatment, not finished drinking water.

USGS NWIS gauge data (as of 2006-09-29T23:30:00.000-06:00) puts ARKANSAS RIVER at 373.0 cfs — well below its long-term average at 49% of mean — low-flow conditions worth noting for water-dependent ecosystems. Streamflow is a leading indicator of drought stress, sediment load, and dilution capacity: low flows concentrate pollutants and warm water temperatures, stressing aquatic life and, in surface-water-dependent systems, the source water quality for treatment plants.

EPA's Water Quality Portal (WQP) aggregates monitoring data from federal, state, and tribal agencies. Fremont County has moderate coverage with 27 active monitoring sites with 9,440 recent measurements on record. Predominant monitoring categories include inorganics, minor, metals and physical. More monitoring sites generally indicate greater scientific attention to local water conditions — and provide the baseline data that regulators use to set future impairment listings.