Water Discharge Data — Searchable and Tracked

Facilities report what they discharge into rivers, streams, and waterways under NPDES (National Pollutant Discharge Elimination System) permits. We make those public records searchable and show when reported values exceed permit limits — known as exceedances. Email digests for specific facilities, counties or parameters are part of the paid plan; new sign-ups are paused while recurring collection is verified.

See a sample search · about email alerts for specific facilities

EXAMPLE SEARCH RESULTS

Illustrative sample — not live records.

SAMPLE CITY WASTEWATER PLANT
PA0000000Allegheny
Most reported over limit: Total Suspended Solids
SAMPLE VALLEY JT SEWER AUTHORITY
TX0000000Travis
Most reported over limit: Fecal Coliform
SAMPLE CREEK STP
VA0000000Henrico
Most reported over limit: Ammonia-Nitrogen

Open search

Illinois, Pennsylvania, Texas, and Virginia discharge monitoring data

7,424

Permits Tracked

141,576

Limit Exceedances

245

Parameters Monitored

Illinois

32,212

Pennsylvania

42,423

Texas

55,797

Virginia

11,144

Permits, exceedances, and parameters are counted through each state's primary source. A search can return more permits than shown here, because it also includes permits that appear only in the federal feed. How these counts are scoped.

Pennsylvania data comes from the state agency's monitoring system; Illinois, Texas, and Virginia from the federal discharge-monitoring feed, which carries less facility detail. See Methodology for sources.

Standard coverage includes monitoring periods from the most recent 5 years — currently January 2021 through September 2026. Older records are retained but not shown by default.

Data Disclaimer: Permit Minder reformats publicly available discharge monitoring report (DMR) data self-reported by permitted facilities to their permitting authority. The appearance of a record does not indicate any regulatory determination. Exceedance data reflects reported values compared to permit limits on file and does not reflect whether any exceedance involved a permitted upset or bypass under 40 CFR 122.41(n)/(m), a variance, consent order, or approved compliance schedule. Permit Minder is independently operated and is not affiliated with EPA or any government agency. If you believe any record is inaccurate, please submit a data correction request.

How It Works

Facilities with NPDES permits are required to self-report discharge monitoring data to their permitting authority. When a reported value exceeds the numeric limit in a facility's permit, that's an exceedance. Permit Minder compiles these public records into a searchable database so anyone can find exceedances without digging through state reporting systems.

Search

Search NPDES-permitted facilities by permit number, facility name, county, or discharge parameter. Facility name and county come from the federal facility bundle; where a permit is absent from it, both are shown blank. Receiving stream and facility type are not available for records collected from the federal feed.

Review

See reported discharge values alongside permit limits, with percentage-over-limit calculations for each monitoring period.

Monitor

Email digests for specific facilities, counties or parameters, daily or weekly, with unsubscribe at any time. New sign-ups are paused while recurring collection is verified end to end.