Pro SWPPP – America’s #1 SWPPP Service helps contractors across Texas and the nation avoid surprise shutdowns, fines, and permit headaches. If you’re building in San Antonio and you just heard the words “SWPPP” or “NOI” for the first time, you’re in the right place. This guide will show you exactly what San Antonio requires, when you need a plan, and how to stay legal without wasting weeks on forms.
Why San Antonio Takes Stormwater Seriously
San Antonio sits on top of the Edwards Aquifer. That’s the water supply for over two million people. Every time it rains on a construction site, dirt and chemicals can wash into storm drains and straight into drinking water. The Clean Water Act and NPDES program exist to stop that. In Texas, the state agency TCEQ runs the show under a permit called TXR150000. Local agencies like San Antonio Water System (SAWS) and Bexar County add their own rules on top.
Here’s the bottom line: if you disturb one acre or more of soil, you need a Stormwater Pollution Prevention Plan. That’s a SWPPP. Depending on how much land you disturb, you may also file an NOI with the state and a notice with the city or county. Miss a step and inspectors can red-tag your job, levy fines, or require you to redo all your erosion control. Pro SWPPP writes hundreds of SWPPPs every year and knows every San Antonio rule inside and out.
The One-Acre Trigger and Why It Matters
Federal and Texas law draw the line at one acre. If you will disturb one acre or more of ground, you must prepare and follow a SWPPP. This rule applies even if your individual lot is smaller, as long as it’s part of a “larger common plan of development” that totals one acre or more. For example, a 20-home subdivision counts as one plan, so every builder in that subdivision needs coverage.
Once you hit the one-acre mark, your next question is: how many acres? The answer determines which notices you file.
One to Five Acres: Small Construction Site Notice
Sites that disturb between one and five acres fall under a simplified track. You prepare a SWPPP, install Best Management Practices like silt fence and inlet protection, and complete a Small Construction Site Notice. In San Antonio city limits, you send that notice to SAWS at least 48 hours before you break ground. If you’re in unincorporated Bexar County, you send it to Bexar County Public Works and apply for a Storm Water Quality Site Development Permit.
Five Acres or More: Notice of Intent
Projects disturbing five acres or larger must file a Notice of Intent with TCEQ through the online STEERS system. You also send a Large Construction Site Notice to the local MS4 operator (SAWS or Bexar County). The NOI fee is currently about $225. Filing the NOI grants you permit coverage under TXR150000, the Construction General Permit. You still need a SWPPP, but now the state tracks your project directly.
Don’t want to mess with all the paperwork and requirements? Check out Order your SWPPP now with Pro SWPPP Professional CPESC Certified SWPPP Services.
What Goes Into a San Antonio SWPPP
A SWPPP is not a one-page form. It’s a site-specific document that describes your project, identifies pollution risks, and lists the controls you will use to keep dirt and chemicals out of the storm drain. Texas regulators and local inspectors expect to see the following sections every time.
Site Description and Maps
You start with a map showing your property boundary, existing topography, drainage patterns, soil types, and nearby waterways. Mark every storm drain inlet and outfall. Show where water flows when it rains. This map proves you understand how stormwater moves across your site.
Construction Phasing and Activities
Describe what you will build and in what order. Will you clear trees first, then grade, then pave? Each phase creates different pollution risks. Your SWPPP must explain the sequence so inspectors know which controls to expect at each stage.
Pollutant Sources
List every potential source of pollution: stockpiles of dirt, fuel tanks, paint, concrete washout areas, portable toilets, trash bins, and vehicle maintenance zones. Identifying sources up front lets you plan controls before problems start.
Best Management Practices for Erosion and Sediment Control
This is the heart of the SWPPP. You choose structural controls like silt fence, rock check dams, sediment basins, stabilized construction entrances, and inlet protection. You also commit to non-structural practices like limiting the area of disturbed soil, seeding and mulching quickly, and sweeping paved areas. Every BMP gets a location on your site map and a maintenance schedule.
Inspection and Maintenance Procedures
Texas requires inspections at least every seven or 14 days, depending on project risk, and within 24 hours after any storm that drops half an inch or more of rain. Your SWPPP names the person responsible for inspections, provides a checklist, and explains how you will fix problems. SAWS and Bexar County both require certified stormwater inspectors for many projects, so keep training certificates with your plan.
Training and Recordkeeping
Name your site superintendent and SWPPP coordinator. Describe how you will train crews on erosion control and spill response. Commit to keeping the SWPPP, inspection logs, rain gauge records, and photographs on site at all times. Inspectors can ask to see these records without notice.
San Antonio City Limits: SAWS Rules
If your project is inside San Antonio city limits, SAWS is your local enforcer. SAWS adopted a Construction Stormwater Ordinance in 2014 that layers requirements on top of the state permit. Here’s what you must do.
- Submit your NOI or Small Construction Site Notice to SAWS at least 48 hours before you start work.
- Post your TPDES permit coverage and site notice on site where inspectors can see it from the street.
- Use a certified stormwater inspector to conduct and document all required inspections.
- Keep your SWPPP current and available for SAWS staff who may visit without advance warning.
SAWS treats non-compliance as a public nuisance and can levy fines or stop your work. The ordinance is strict because the Edwards Aquifer is so sensitive. Pro SWPPP has filed hundreds of notices with SAWS and can handle the submission for you so nothing falls through the cracks.
Unincorporated Bexar County: Storm Water Quality Permits
Projects outside the city limits fall under Bexar County Public Works. The county runs its own Storm Water Quality Site Development Permit program. You need this permit for any site disturbing one acre or more, or less than one acre if part of a larger common plan.
The permit application requires your SWPPP, an erosion control plan, a site plan, a copy of your Construction Site Notice, acknowledgement of any Waters of the US on or near your site, and a dewatering plan if you will pump groundwater. The permit fee is $500 and the review takes at least 30 days, so apply early.
Bexar County inspects during construction and requires long-term maintenance after you finish. You must renew your Stormwater Quality Permit annually, submit quarterly maintenance reports, and use a certified maintenance provider if you fall behind. That ongoing accountability is unusual compared to other counties, but it reflects how serious Bexar County is about water quality.
Edwards Aquifer Projects: An Extra Layer
If your site is over the Edwards Aquifer Recharge Zone or drains toward it, TCEQ requires an Edwards Aquifer Protection Plan in addition to your SWPPP. The EAPP has stricter thresholds and tighter controls for infiltration, spills, and permanent stormwater facilities. You may need a geotechnical study and a hydrogeologist’s sign-off.
Identify aquifer zones during site selection. Waiting until the permit stage to discover you’re on the Recharge Zone can delay your project by months. Pro SWPPP coordinates EAPP preparation with your SWPPP so both documents align and you only go through review once.
Not sure what your project needs? Take our SWPPP Quiz or schedule a free SWPPP consultation with CPESC Certified SWPPP Expert Derek E. Chinners from Pro SWPPP.
City Drainage Reports and the Unified Development Code
San Antonio’s Unified Development Code requires a separate stormwater management report for most projects. This report focuses on permanent drainage design: where runoff goes, how fast it flows, and whether you need detention ponds. You must submit drainage maps, time-of-concentration calculations, runoff coefficients, and rainfall intensity tables for 5-year, 25-year, and 100-year storms.
The drainage report is not the same as your SWPPP. The SWPPP covers temporary construction controls. The drainage report covers permanent post-construction hydrology. Both are required, and both must be approved before you can get a grading permit. Many contractors bundle the two into a single stormwater package to streamline review.
Step-by-Step: How to Get Compliant Before You Dig
Follow this checklist and you won’t miss a deadline or a form.
- Measure your total land disturbance and confirm whether your lot is part of a larger common plan.
- Determine jurisdiction: Are you inside San Antonio city limits (SAWS) or in unincorporated Bexar County?
- Check if you’re on or near the Edwards Aquifer Recharge Zone.
- Hire a qualified firm like Pro SWPPP to write your site-specific SWPPP and drainage report.
- If you disturb five acres or more, file an NOI with TCEQ via STEERS and pay the state fee.
- If you disturb one to five acres, complete a Small Construction Site Notice.
- Submit your NOI or notice to SAWS or Bexar County at least 48 hours before construction starts.
- Apply for the Bexar County Storm Water Quality Site Development Permit if required and wait for approval.
- Install your BMPs before major grading begins.
- Conduct inspections on schedule, document findings, and fix problems immediately.
- Keep your SWPPP and all records on site in a weather-proof binder or digital device.
- When the site is stabilized with at least 70 percent vegetation cover, file a Notice of Termination with TCEQ to close your permit.
- Transition to long-term maintenance and reporting if Bexar County requires it.
This process sounds like a lot, but Pro SWPPP walks you through every step. We prepare the documents, file the notices, train your crews, and provide inspection support so you can focus on building.
Common Mistakes and How to Avoid Them
Thinking You’re Too Small to Need a SWPPP
Many contractors assume that because they’re under five acres, they don’t need anything. Wrong. Texas requires a SWPPP at one acre. You still file a notice and follow the permit, even if you skip the formal NOI. Always check the common-plan rule, too. A single-family home in a ten-lot subdivision is part of a larger plan and counts toward the one-acre threshold.
Installing BMPs After Grading Starts
The permit says controls must be in place before you disturb soil. Waiting until after the first rain to put up silt fence guarantees a violation. Install perimeter controls, inlet protection, and stabilized entrances during mobilization, before the bulldozer shows up.
Confusing the SWPPP With the Drainage Report
These are separate documents with different purposes. The SWPPP addresses temporary construction pollution. The drainage report addresses permanent hydrology and detention design. Both get submitted to the city or county, but they go to different reviewers and serve different goals. Don’t try to combine them into one unless your engineer explicitly structures it that way.
Failing to Update the SWPPP
Your SWPPP is a living document. When you add a new phase, move a sediment basin, or bring in a different subcontractor, update the plan. Inspectors expect the paper to match the field. An outdated SWPPP is almost as bad as having no SWPPP at all.
Ignoring Edwards Aquifer Requirements
If your site is on the Recharge Zone, you face an extra layer of TCEQ review and stricter pollution controls. Discover this fact during due diligence, not after you’ve designed your site. The EAPP can take months to approve, so factor it into your schedule from day one.
Why Certified Inspections Matter
SAWS requires certified stormwater inspectors for projects in the city. Bexar County expects certified maintenance providers for long-term permit compliance. Certification proves your inspector knows Texas rules, can identify BMP failures, and understands when corrective action is needed.
Training your site superintendent or foreman in basic stormwater principles pays off. They can spot problems between formal inspections and fix small issues before they become violations. Pro SWPPP offers inspection services and can train your team so everyone knows what to look for and how to document it.
What Happens If You Skip the SWPPP
Operating without a SWPPP or valid permit coverage is a violation of the Clean Water Act and Texas law. TCEQ can issue a Notice of Violation, assess penalties up to tens of thousands of dollars per day, and require you to stop work until you come into compliance. SAWS and Bexar County can also red-tag your site, levy fines, and treat the violation as a public nuisance.
Beyond fines, non-compliance damages your reputation. Owners and general contractors now routinely ask for proof of SWPPP and permit coverage before awarding contracts. A history of violations can disqualify you from future bids. The cost of doing it right the first time is always less than the cost of fixing a violation.
How Pro SWPPP Makes Compliance Easy
Pro SWPPP is America’s #1 SWPPP Service because we combine speed, expertise, and customer support. Our team includes CPESC-certified professionals who know San Antonio, Bexar County, and Texas regulations inside and out. We write site-specific SWPPPs in days, not weeks, and we handle every filing and notice on your behalf.
When you work with us, you get a dedicated project manager, a custom BMP plan with maps and specifications, all required forms and notices, and ongoing support for inspections and updates. We also serve contractors in Georgia and dozens of other states, so if you build in multiple markets, we can keep you compliant everywhere.
Learn more about our team or reach out through our contact page. We answer questions fast and give you straight answers about what your project needs.
San Antonio Stormwater Trends to Watch
Enforcement is getting stricter. SAWS and Bexar County are adding staff and conducting more frequent site visits. TCEQ updated the TXR150000 permit in recent years and now expects more detailed inspection logs and corrective-action documentation. Some local programs are even looking at regulating sites as small as a quarter-acre if they’re part of a larger plan or in a sensitive watershed.
The push for certified inspections and long-term maintenance accountability will continue. Bexar County’s quarterly reporting and annual permit renewal model may become the standard across other Texas counties. Developers should plan for more paperwork, not less, and budget for professional SWPPP services from the start.
Green infrastructure and Low Impact Development techniques are also gaining traction. San Antonio’s Regional Storm Water Management Program encourages developers to reduce runoff volumes, not just treat peak flows. Expect future projects to incorporate bioretention, permeable pavement, and other advanced BMPs that must be integrated into both your SWPPP and your permanent drainage design.
FAQ
Do I need a SWPPP in Texas?
Yes, if you disturb one acre or more of land, or less than one acre if your site is part of a larger common plan that totals one acre or more. Texas follows the federal Clean Water Act and issues permits under TCEQ’s TXR150000 Construction General Permit.
What is the difference between an NOI and a Construction Site Notice?
An NOI is a formal application filed with TCEQ for projects disturbing five acres or more. A Construction Site Notice is a simpler form used for projects between one and five acres. Both notify regulators that you will conduct construction, but only the NOI triggers direct state tracking and a permit fee.
Who enforces stormwater rules in San Antonio?
TCEQ enforces the state construction permit. SAWS enforces local rules inside San Antonio city limits. Bexar County Public Works enforces rules in unincorporated areas. All three agencies can inspect your site and issue violations.
How much does a SWPPP cost in San Antonio?
Costs vary by project size and complexity. A basic SWPPP for a one-acre site might cost $1,000 to $2,000. Larger or Edwards Aquifer projects can run $5,000 or more when you include the EAPP and drainage report. TCEQ charges about $225 for an NOI filing. Using a professional service like Pro SWPPP ensures you get everything right the first time and avoid costly rework.
How long does it take to get a SWPPP approved?
The SWPPP itself doesn’t require formal approval in most cases. You prepare it, file your NOI or notice, and begin work once the filing is accepted. Bexar County’s Storm Water Quality Site Development Permit does require review, which takes at least 30 days. Plan ahead and submit your application well before your planned start date.
Can I write my own SWPPP?
Technically yes, but it’s risky. TCEQ and local agencies expect site-specific plans that address every pollution source and include properly sized BMPs. A template downloaded from the internet won’t pass muster. Hiring a CPESC-certified professional from Pro SWPPP ensures your plan meets all federal, state, and local requirements and protects you from violations.
What happens if I don’t file an NOI or notice?
You are operating without permit coverage, which is a violation of the Clean Water Act. TCEQ can issue fines, require you to stop work, and force you to remediate any damage. SAWS or Bexar County can also red-tag your site and pursue enforcement through local ordinances. The penalties add up fast, so always file before you break ground.
Do I need a separate Edwards Aquifer Protection Plan?
If your site is on the Edwards Aquifer Recharge Zone or drains to it, yes. TCEQ requires an EAPP in addition to your SWPPP. The EAPP includes more detailed hydrology, stricter pollution controls, and often a geotechnical study. Check TCEQ’s Edwards Aquifer maps early in your project planning.
How often do I have to inspect my BMPs?
At least every seven or 14 days, depending on your project risk level, and within 24 hours after any storm that drops 0.5 inches or more of rain. Document every inspection with photos, notes, and corrective actions. SAWS requires certified inspectors for many projects, so keep training certificates with your SWPPP.
When can I file a Notice of Termination?
After you achieve final stabilization, which typically means at least 70 percent vegetation cover or equivalent permanent measures like pavement or rip-rap. File the NOT with TCEQ to officially close your permit coverage. Keep records for at least three years after termination in case of audits.
Ready to get started? Order your SWPPP now or schedule a free consultation with Pro SWPPP.
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Official Stormwater Resources for San Antonio Builders
For authoritative guidance, rely on the agencies that regulate construction stormwater in Texas and at the federal level:
- TCEQ Construction Stormwater General Permit (TXR150000) — the Texas permit governing your San Antonio SWPPP and Notice of Intent.
- EPA Construction Stormwater Discharges — the federal Clean Water Act framework behind every state Construction General Permit.
Related SWPPP Compliance Resources
- Texas SWPPP Requirements: statewide TCEQ compliance guide
- What Is an SWPPP? A plain-English overview
- Pro SWPPP services across Texas
- Start your San Antonio SWPPP today
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Derek E. Chinners — Founder & Stormwater Consultant, CPESC · 833-GET-SWPPP