NJDEP Runs Your Permits, EPA Watches the Program, and Towns, Soil Districts, and Sewerage Authorities Hold the Rest
If you run a facility in New Jersey and you get a letter or an inspector at the gate about rainwater runoff, wastewater, or a spill, it's natural to assume the federal government is involved. Usually it isn't. New Jersey runs its own water permit program, and the agency you'll deal with most is the New Jersey Department of Environmental Protection (NJDEP), not EPA. But NJDEP isn't the only group with a say over what leaves your property, and that's where facility managers get tripped up.
This article walks through who regulates what: how NJDEP and EPA split the work, what your town can require on top of a state permit, what Soil Conservation Districts do on construction sites, and when a local sewerage authority gets involved. We've put a who-does-what table in the middle so you can see it all at a glance. If you'd rather talk through your own site, you can always reach out to RMA, and we'll tell you honestly which agencies apply to you.
Table of Contents
TL;DR
For water rules at a New Jersey business, NJDEP is the agency that issues your permits, inspects your site, and enforces the state's NJPDES program. EPA Region 2 oversees NJDEP and keeps the power to step in, and it directly enforces some federal rules like the SPCC oil storage rule. Your town enforces local stormwater ordinances, the Soil Conservation District handles construction soil erosion plans, and a sewerage authority controls what goes down the drain. A facility can answer to more than one of them at the same time.
How Do NJDEP and EPA Split Up NJPDES Permitting and Enforcement?
The federal Clean Water Act created the National Pollutant Discharge Elimination System (NPDES), the permit program that covers wastewater and rainwater leaving a facility. EPA is allowed to hand that program to a state that meets federal requirements, and New Jersey is one of the states that took it. EPA delegated NPDES permitting authority to NJDEP, and the state runs its version as the New Jersey Pollutant Discharge Elimination System, or NJPDES, under state rules at N.J.A.C. 7:14A. When a New Jersey business needs a permit for stormwater or wastewater, that permit comes from NJDEP.
EPA doesn't disappear, though. EPA Region 2, which covers New Jersey and New York, keeps an oversight role. The agreement between the two agencies has EPA making sure the state runs the program the way federal law requires, and EPA keeps the ability to step in with its own enforcement if it decides the state isn't doing the job. For most facilities, day-to-day contact is all NJDEP. Applications, authorizations, inspections, and violation notices come from the state, and plenty of New Jersey businesses go years without hearing from EPA about their stormwater permit.
For industrial stormwater, NJDEP offers several kinds of coverage. There's the Basic Industrial Stormwater General Permit (5G2), a set of industry-specific general permits for categories like concrete products, hot mix asphalt, mining, sand and gravel, scrap metal, vehicle recycling, and wood waste recycling, individual permits for situations that don't fit a general permit, and an exclusion for sites with no exposure of materials to rainwater. Which one fits depends on your industry, what's sitting outside, and where your runoff goes. We break that down in our guide on which NPDES permit you need and in our plain-English NJPDES requirements article. Industrial coverage usually comes with a stormwater pollution prevention plan, which people also call an SPPP, an SP3, or just a stormwater plan. We'll call it a SWPPP here, and our explainer on what a SWPPP is covers the basics.
Who Does What? New Jersey Water Regulators Compared
Here's how the pieces fit together. Think of it as a map of who you might hear from and what each one controls at a typical industrial or commercial site.
| Agency |
What it controls at your facility |
How it enforces |
| NJDEP |
NJPDES industrial stormwater permits (5G2, industry-specific general permits, individual permits), no exposure exclusions, process wastewater discharges, construction stormwater authorizations, and New Jersey's spill laws |
Reviews applications, inspects sites, and issues violation notices and penalties |
| EPA Region 2 |
Oversees how NJDEP runs NJPDES, and directly administers federal rules such as the SPCC oil storage rule |
Can inspect and take its own federal enforcement action, and can step in when it believes the state isn't acting |
| Your municipality |
Local stormwater ordinances, dumping and illicit connections to storm drains, upkeep of private stormwater basins, and local site plan approvals |
Enforces its own ordinances, and answers to NJDEP for its municipal stormwater program |
| Soil Conservation District |
Soil erosion and sediment control plan certification for construction and land disturbance |
Reviews plans and inspects construction sites against the certified plan |
| Sewerage authority |
What industrial wastewater you can send to the sewer, and the pretreatment rules that come with it |
Issues its own permits or agreements, and can restrict or shut off a connection for violations |
| Regional bodies (Pinelands Commission, Highlands Council, Meadowlands, DRBC) |
Additional land use or watershed rules, depending on where your site sits |
Varies by agency and by location |
The pattern to notice is that the permit lives with NJDEP, and everyone else controls a different door water can leave through or a different stage of a project. Holding an NJDEP permit doesn't excuse you from a town ordinance or a sewer rule, and a town can't hand you or waive your state permit.
What Do Municipal MS4 Programs and Stormwater Ordinances Mean for Your Facility?
A municipal separate storm sewer system, or MS4, is the network of storm drains, pipes, ditches, and roadside inlets a town owns and operates. Under NJDEP's municipal stormwater permits, New Jersey towns have to run a stormwater program of their own. That includes a stormwater pollution prevention plan, a municipal stormwater management plan, a stormwater control ordinance, and a pet waste ordinance, along with public education, good housekeeping at municipal operations, and rules for runoff from construction and new development. The program has long been split into Tier A and Tier B municipalities, though NJDEP folded the old Tier B towns into Tier A starting in 2023.
That's a municipal permit, so why would a private facility care? Because the town has to pass its obligations down to the properties around it. A facility can run into the local program in a few ways. Dumping anything other than stormwater into a storm drain is prohibited by local ordinance. Private stormwater basins and inlets on your property may have to be maintained to a local standard. Redevelopment or expansion usually triggers local site plan review, with its own stormwater design requirements. The town enforces all of this through its own code enforcement, engineering, or health department staff, and who does what varies from one municipality to the next.
Local stormwater utility fees are a separate thing again. They're a billing program some towns and counties run, and they have nothing to do with your NJDEP permit status. If you're not sure whether something you're discharging counts as stormwater or as process water, our article on the difference between stormwater and process water is a good place to start, because the answer decides which regulator cares.
What Do Soil Conservation Districts Regulate During Construction in New Jersey?
New Jersey has 15 Soil Conservation Districts, and they handle the soil erosion and sediment control side of construction. If a project clears, grades, or excavates land, the district reviews and certifies the soil erosion and sediment control plan, then inspects the site to make sure the work follows it. Separately, construction that disturbs one acre or more generally needs authorization under NJDEP's construction general permit (5G3). That authorization is requested through NJDEP's online system, and it's required in addition to the district's plan certification, not instead of it.
This is the one corner of New Jersey water regulation where we want to be plain about what we don't do. RMA doesn't prepare construction-phase permits or approvals. That covers 5G3 coverage, Soil Conservation District certification, major development stormwater design under N.J.A.C. 7:8, and municipal site plan stormwater approvals. For those, you'll usually work with your site engineer, your contractor, or a soil erosion specialist. If it helps, we're glad to talk through what the construction phase is likely to need and point you toward the right people.
Here's where we come in. A new or expanded facility almost always needs a second set of requirements once it's up and running: the right NJPDES industrial permit or a no exposure exclusion, a SWPPP, inspections and certifications, sampling where the permit calls for it, and often an SPCC plan and Community Right to Know reporting. Those belong to NJDEP and, for some of them, EPA. Our guide on how long a New Jersey stormwater permit takes helps you plan that timeline alongside construction, and it's worth starting early so permits aren't the last thing holding up your opening.
When Does a Sewerage Authority Regulate Your Facility's Discharge?
NJPDES isn't the only way water leaves a facility. If you send wastewater to a public sewer instead of a stream or the ground, you're what the regulations call an indirect user, and the sewerage authority that runs the treatment plant has a say. Its job is to keep your discharge from disrupting the plant, passing through untreated, or interfering with how it handles sludge. Every indirect user has to meet minimum discharge criteria under N.J.A.C. 7:14A, Subchapter 21, which also adopts the federal pretreatment rules at 40 CFR Part 403.
Larger industrial dischargers, and anyone subject to federal categorical pretreatment standards, can be classified as significant indirect users, or SIUs, and that brings a permit. Who issues it depends on the local agency. Some sewerage authorities have been delegated their own pretreatment program by NJDEP and issue and enforce their own SIU permits. For authorities without that delegation, NJDEP issues the SIU permit itself. Even where a state permit isn't required, a non-delegated authority may still require its own permit or agreement. Violations can lead to restrictions on your connection, including having it closed off.
Stormwater adds a wrinkle. Where a site drains to a combined sewer, or to a storm drain, or straight to a stream changes which rules apply, and the authority's rules may apply instead of an NJDEP stormwater permit or alongside one. We don't recommend assuming anything based on your city or county. Confirm where your site drains and call the authority that serves it before you decide you're covered or exempt.
Who Can Inspect, Fine, or Sue a New Jersey Facility Over Water Violations?
More parties than most people expect, and they don't coordinate their timing. NJDEP can inspect your site, review your records, and issue notices of violation and penalties under New Jersey's Water Pollution Control Act. EPA can do the same under federal law, and tends to do it directly for things it administers itself, like SPCC oil storage requirements. Your town can cite you under a local ordinance. A Soil Conservation District can stop a construction site that strays from its certified plan, and a sewerage authority can penalize or restrict a discharge that breaks its rules. Penalties under the Clean Water Act and state law can be assessed per violation and per day, so a problem left alone adds up quickly.
Private parties matter too. Both the federal Clean Water Act and New Jersey's Water Pollution Control Act let citizens and environmental groups bring suits in certain situations, usually after giving notice. That's another reason to keep your permit paperwork, inspection records, and sampling results in order, whether or not any agency is watching.
If you receive a formal notice of violation, an administrative order, or a notice of intent to sue, an environmental attorney is the right person to bring in alongside your consultant. We can help you understand what the permit requires and fix the compliance gap, but the legal exposure is a lawyer's call. If you're facing an inspection and aren't sure what's expected, our article on common NPDES permit problems shows where facilities usually get caught, and our online training library is a low-cost way to get your team up to speed.
How Can RMA Help You Sort Out Which New Jersey Agencies Apply?
We're based in New Jersey and have worked with NJDEP on stormwater permits for a long time, so we know how the permit categories fit together and where facilities typically end up in the wrong one. Most of our NJPDES work is the operational side: figuring out whether you need a 5G2, an industry-specific general permit, an individual permit, or no permit at all, developing your SWPPP, and getting your inspections, certifications, and sampling on track. Senior staff do that work, and we don't hand it off to junior people or to AI.
We'll also tell you when you don't need us. If your site doesn't need a permit, or if your question is really about a construction approval or a sewer connection that someone else handles, we'll say so and point you the right way. If you'd like a second set of eyes on which agencies apply to your facility, you can call us, email us, or fill out the form on our website. There's no pressure and no obligation, and you're welcome to contact RMA whenever it's useful.
