Pennsylvania Water Discharge Data — Searchable and Tracked

Facilities across Pennsylvania 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. Subscribe to email digests for specific facilities, counties, or parameters.

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Pennsylvania discharge monitoring data

2,551

Permits Tracked

Counties in Dataset

49,888

Limit Exceedances

195

Parameters Monitored

Standard coverage includes Pennsylvania monitoring periods from the most recent 5.5 years — currently January 2021 through June 2026. Older records are retained but not shown by default.

Data Disclaimer:Permit Minder reformats publicly available discharge monitoring report (DMR) data from EPA's ICIS-NPDES system, published through EPA ECHO. This data is self-reported by permitted facilities to their permitting authority, which reports it to EPA. 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, PA DEP, 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, which reports it to EPA. 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, Pennsylvania county, or discharge parameter. Facility name and county come from the EPA 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 EPA feed.

Review

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

Monitor

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