At Princeton Analytical Labs, we provide certified laboratory testing and documentation support for facilities operating under NPDES (National Pollutant Discharge Elimination System) permits throughout Pennsylvania. Whether your site discharges industrial wastewater, treated effluent, or stormwater runoff, our team helps ensure your monitoring results meet all state and federal reporting standards under 25 Pa. Code Chapter 92a and the Clean Water Act.
What is NPDES Permitting?
The NPDES program regulates any point-source discharge of pollutants into U.S. waters.
In Pennsylvania, the Department of Environmental Protection (DEP) administers these permits to protect rivers, lakes, and streams from contamination and to ensure facilities maintain proper wastewater and stormwater controls.
If your operation discharges directly or indirectly into surface water — such as through a drain, pipe, or runoff system — you likely need an NPDES permit and routine analytical testing to maintain compliance.
Who Needs NPDES Monitoring?
Princeton Analytical Labs serves clients across a range of sectors that fall under NPDES regulatory oversight, including:
- Municipal wastewater treatment plants (POTWs)
- Industrial and manufacturing facilities
- Food and beverage processors
- Construction sites and land developers (PAG-02 permits)
- Stormwater dischargers under PAG-03
- Small sewage treatment facilities (PAG-04)
- Agricultural and animal operations (CAFOs)
Our lab provides analytical support for both Individual Permits (customized to a specific site) and General Permits (for groups of similar dischargers).
Our NPDES Testing & Support Services
- Certified Laboratory Analysis
Testing for BOD, TSS, pH, oil & grease, nutrients (nitrogen, phosphorus), heavy metals, and other regulated pollutants. - Effluent and Stormwater Sampling
Composite or grab sampling performed under DEP and EPA protocols, with complete chain-of-custody documentation. - Permit Compliance Monitoring
Routine testing schedules to maintain NPDES permit conditions, avoid violations, and ensure data accuracy. - Discharge Monitoring Report (DMR) Assistance
Results formatted for easy inclusion in DEP’s eDMR system, including quality-assured data entry support. - Courier and Field Services
Reliable sample pickup and delivery options across Northeastern Pennsylvania, with rate structures based on service area and sampling frequency. - Consultation and Corrective Action Guidance
Support for exceedance investigation, trend tracking, and corrective-measure planning.
Why Facilities Choose Princeton Analytical Labs
- State-Certified Laboratory recognized by Pennsylvania DEP and EPA.
- Experienced in industrial, municipal, and construction-site sampling.
- Consistent turnaround times that keep your operations compliant without delays.
- Flexible courier options for on-site collection or direct sample transport.
- Professional, audit-ready documentation for all discharges and stormwater events.
Your Partner in Environmental Compliance
Maintaining NPDES compliance is more than just meeting permit limits — it’s about ensuring that every discharge is accurately documented, analyzed, and reported.
With Princeton Analytical Labs, you gain a reliable testing partner who understands the technical requirements, the urgency of turnaround times, and the importance of clear, compliant data.
