• Inspection services
  • Maintenance and repairs
  • Water sampling and lab analysis
  • Preparation and submission of state required documents to the PA DEP / DE DNREC such as Annual Maintenance Reports and permit renewals/transfers
  • Consulting services
  • Advising / individual educational services
  • 24-hour emergency services


Stream Discharge System

Following extensive treatment and disinfection, effluent is discharged directly into a stream.

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Spray System

Wastewater is recycled following treatment and disinfection when used to irrigate vegetated areas.

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Peat Moss/Drip System

Treated wastewater flows through a peat or biofilter, undergoing secondary treatment as microorganisms and chemical processes further cleanse the water. The effluent is then allowed to slowly trickle through soil, delivering nutrients to surrounding vegetation.

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Other Sub-Surface Discharge Systems

We also service other sub-surface systems, such as those that utilize drain fields/leach fields, seepage beds and sand filters.

Diagram Key

1 - Primary treatment; septic tank

2 - Secondary treatment; includes filters (such as peat or sand)

3 - Disinfection


Sewage. Used water discharged from your home. Everyone has to deal with wastewater, be it from the bathtub, washing machine, tub or toilet. Many people who are tied in to a public sewer system never have to give wastewater another thought.

Some residences have private sewage treatment systems. The type of treatment system depends of the type of soil, the proximity to a stream or river, or the characteristics of the wastewater.

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Almost all systems begin with a septic tank / holding tank of some kind. This is where incoming waste has a chance to settle out, with the solids falling to the bottom, and the clearer water on the top moving forward to a secondary treatment compartment, such as intermittent aeration, by way of a removable mixer. There may be a filtration device such a a sand bed or sand filter compartment. Once minute solid particles have been filtered out, the wastewater continues to move forward, either by gravity or sewage pump, to a compartment where the treated water may be disinfected. This is accomplished either chemically or by ultraviolet light treatment. In the former case, chemical neutralization may be necessary. From the neutralization compartment, if any, the treated wastewater is usually discharged into a nearby stream. These small stream discharge systems are the most common. Another method is spray irrigation, where the treated water is pumped under pressure into a series of upright pipes with rotating spray nozzles. This is done in a wooded area or an area where there is infrequent human activity.

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Your local sewage officer, township personnel, and the DEP decide what type of sewage treatment system your property will support. The DEP will issue permits, and provide you with documentation on how to maintain your system.

Compliance with the DEP's permit requirements can be confusing and time consuming, as there are annual maintenance reports to fill out and submit to your local township authorities, and annual bacteria sampling must not exceed permit requirements.

We at Cawley Environmental Services, Inc. are accustomed to dealing with governmental requirements, and are familiar with all types of residential treatment systems.

We provide trained and certified operators who can inspect your system, and make sure that your system operates within the permit limitations. Our skilled administrative staff is able to assist you with your annual report submission and can even handle of all the confusing paperwork for you.


We examine everything from the very beginning of your water path as it leaves your home, and follow it to its conclusion of your specific system. We examine every component thoroughly and will inform you of any findings of concern, if any.

In addition, we will explain how your system works, what to look for should it malfunction, how to prolong the life of your system and we will arrange for your system to be cleaned and pumped when needed.

Whatever type of treatment facility you own, be assured that our courteous and knowledgeable personnel are well trained and approachable should you have any questions about your system.

Call us for a complimentary inspection of your system and we will give you the state-of-the-art recommendations!


Want to know more?

Visit the EPA's and DEP's websites or our FAQ to learn more about the importance of maintaining your system, or call us at 484-593-2989 for more information.