Pasco County Septic Permits and the Weeki Wachee Rule

Pasco County is split between two state cleanup plans, and they could hardly be more different. In the northwest, the Weeki Wachee plan contains the one rule in Florida where the size of your lot stops mattering. Through the middle and east of the county, a plan adopted sixteen years earlier targets bacteria and says nothing about nitrogen at all.

Two Basins, and Only One of Them Cares About Nitrogen

Florida cleans up impaired water through Basin Management Action Plans. A BMAP follows a watershed, not a county line, so which one you are in depends on which way your land drains rather than which side of a road you live on. Pasco contains parts of two, and they were adopted sixteen years apart for two different pollutants.

The northwest of the county drains toward Weeki Wachee Spring, an Outstanding Florida Spring. Central and eastern Pasco drains toward the Hillsborough River. The first is a springs plan built around nitrogen. The second is a surface water plan built around fecal coliform bacteria.

If You Are in the Weeki Wachee Priority Focus Area

The 2025 Weeki Wachee BMAP covers southern Hernando County, including part of Brooksville, and northern Pasco County. Its priority focus area — the inner zone where the strictest rules apply — runs to 90,415 acres. DEP describes its reach into this county plainly: the PFA also includes a small area of northwestern Pasco County.

Septic systems are not a footnote in this plan. DEP attributes 49 percent of the nitrogen load reaching groundwater in the springshed — 641,621 pounds a year — to onsite sewage systems. Pasco County is a named responsible entity in the plan, carrying an assigned reduction of 111,202 pounds a year.

The trigger is a permit. Nobody is going to require you to replace a working system because of a date on a calendar. But the day you apply to modify or replace one, the standard that applies is the current one, not the one in place when your system went in.

If You Are in the Hillsborough River Basin

The Hillsborough River BMAP was adopted on June 30, 2009 and it addresses fecal coliform bacteria. Its area takes in a significant part of the City of Tampa along with portions of central and eastern Pasco County and western Polk. The New River waterbody sits in southeastern Pasco and northern Hillsborough.

It is not a nutrient plan. It contains no priority focus area and no onsite sewage remediation plan, so none of the machinery described above reaches you here. What it does contain is a finding that failing drainfields in low-lying older neighborhoods are a suspected bacteria source — a different pollutant, a different plan, and the same practical advice. A drainfield that has stopped working is a problem on any map.

Getting a Permit in Pasco County

Pasco permits through Environmental Health Services at the Florida Department of Health in Pasco County, not through DEP. Seventeen Florida counties moved to DEP permitting — sixteen in the panhandle in January 2025 and Marion in July 2025. Pasco was not among them.

There are two offices. 5640 Main Street, New Port Richey, FL 34652 on (727) 841-4425, and 13941 15th Street, Dade City, FL 33525 on (352) 521-1450. Both use option 5 on the phone menu according to the current application packet, though the department’s web page says option 3 — try 5 first. The fax for both is (727) 484-3866.

The rule chapter to look for is Chapter 62-6, Florida Administrative Code. If a page tells you Pasco septic systems fall under Chapter 64E-6, that page is out of date — 64E-6 was the Department of Health chapter before the onsite sewage program transferred to DEP in 2021. Our Florida septic regulations page covers what changed.

Pasco Publishes Its Permit Fees, Which Almost No County Does

This is worth calling out because it is genuinely unusual. Most Florida county health departments publish no septic fee schedule at all — DEP simply says that your county health department determines the total. Pasco prints the numbers in its own new system application packet.

The packet notes that additional fees may apply, and it carries no revision date, so confirm the figures when you call. As a sense check, the state fee rule sets a $55 permit, a $75 initial inspection and a $5 research surcharge, which is exactly Pasco’s $135. The $255 runs above the state plan review and site evaluation fees, which is the county portion DEP refers to.

When Is Sewer Actually Available? Pasco Publishes the Test

Whether sewer is available decides a great deal — whether you can install a conventional system at all, and whether you are required to connect instead. Most guidance leaves the word undefined. Pasco publishes a four-part test, applying sections 381.0065 and 381.0655 of the statutes. Sewer counts as available if:

• a line exists in a public easement or right-of-way that abuts the property
• a line is within 50 feet of the property line
• a system exists within a quarter mile of the nearest property line, for new development in industrial or manufacturing zoning
• a system exists within 500 feet of an establishment’s sewer stub-out, in the case of repairs

Separately, and regardless of the above, section 403.067 gives an existing system owner 365 days from written notice by the utility that connection is available. That clock is statutory, not a county policy.

The $10,000 Upgrade Grant Most Eligible Homeowners Never Hear About

Pasco County runs a Septic Upgrade Incentive Program funded by a DEP grant, reimbursing up to $10,000 toward an advanced nitrogen-reducing system. The eligible area is the Weeki Wachee BMAP area, specifically the Spring Hill portion of Pasco County, and the county publishes an eligibility map so you can check an address rather than guess.

Eligible technology is the same list the BMAP requires: in-ground nitrogen-reducing biofilters, NSF 245-certified aerobic treatment units, and nitrogen-reducing performance-based treatment systems. Applications go through Gerrit Van Lent at Pasco County Utilities.

What It Costs If You Are Paying

The permit is the small number. See our Florida installation cost breakdown for current ranges, and bear in mind that an enhanced nitrogen-reducing system runs several times a conventional one — which is what makes the priority focus area boundary financially significant rather than merely technical. Our Florida septic assistance page covers grant and loan routes, and pumping costs covers routine service.

No county or municipal septic-to-sewer conversion program is published for Pasco or for New Port Richey, Zephyrhills, Dade City, Land O’ Lakes or Wesley Chapel. That is not the same as saying none exists — only that none is published. If your neighborhood is being surveyed for sewer, ask before committing to a new drainfield.

A useful contrast. Weeki Wachee applies its nitrogen requirement to lots of all sizes. Volusia County’s two 2025 springs plans limit theirs to lots of one acre or less — same agency, same 65% standard, same adoption year, different threshold. If you own more than an acre, that difference decides whether the requirement reaches you. See Volusia County septic permits for how the same rule was written differently one county over.