Flood & Storm Damage Restoration Watertown, CT
Steele Brook and Naugatuck Corridor Flooding Cleared 60-Minute Emergency Response, Direct Insurance Billing
IICRC Certified
Owner On Every Job
Eco-Friendly Solutions For Healthier Spaces
Reviewed by David Megeneishvili · Licensed & Insured In CT · IICRC AMRT + WRT
Live data from the National Weather Service, updated continuously.
Trusted by Families in Watertown &
Litchfield County
4.9 out of 5, Rated by your neighbors on Google
We discovered mold when removing our pellet stove and called Green Restoration for help. David was very communicative and helpful throughout the entire process. He did the job thoroughly and professionally. Highly recommended!
David Woolner
Mold RemediationI had a fantastic experience with Green Restoration. From start to finish, the team was professional, thorough, and extremely knowledgeable. David came for the initial inspection and took the time to explain the entire process.
Annmarie Gieparda
Mold RemediationWe had mold due to a water leak in our half finished basement. David and his crew did a great job, we were very satisfied. I would highly recommend Green Restoration to anyone.
Tanya
Water DamageI needed my entire condo completely cleaned after a soot blow back. Green Restoration was top shelf! So thorough and professional. Thank you so much!
Jacki Hornish
Fire & Soot CleanupWhat Does Flood & Storm Damage Restoration In Watertown, CT Involve?
Flood and storm damage restoration in Watertown, CT covers storm work (roof tarp-up, fallen-tree removal, board-up) and Category 3 floodwater (Steele Brook flash flooding through Downtown and Oakville, Naugatuck River downstream surge, Black River drainage, and sewer surcharge). Green Restoration extracts, decontaminates, dries, and documents for your NFIP and Connecticut homeowners carriers, targeting a 60-minute response across Watertown, 24/7.
Watertown Flood History
Steele Brook runs through the heart of Downtown Watertown and Oakville and carries FEMA Zone AE designation through portions of its channel. The Naugatuck River forming the eastern boundary of Watertown adjacent to Oakville receives Steele Brook inflow and Thomaston Dam controlled releases from upstream, creating compounding flood pressure on Oakville commercial and residential foundations during prolonged rainfall events.
Source: FEMA Flood Insurance Rate Maps, Litchfield County CT; CT DEEP Naugatuck River Watershed. Photo: FEMA / DHS, public domain (representative regional photo).
- FEMA Designation
- Zone AE + X
- Primary Flood Vectors
- Steele Brook flash flooding through Downtown and Oakville, Naugatuck River downstream surge, Black River drainage, municipal sewer surcharge
- NFIP Coverage Caps
- $250K building · $100K contents
- Target Response
- 60 min, 24/7
Verify Your Flood Zone
(860) 222-9498Complete Flood & Storm Damage Restoration In Watertown, CT
One emergency response for storm cleanup and flood extraction for Steele Brook overflow, Naugatuck River surge, Black River drainage, and sewer backup. Every loss documented for your insurer.
IICRC S500 §5.3 Category 3 Black Water Extraction
Downtown Watertown, Oakville, and Steele Brook corridor properties hit by brook overflow, sewer surcharge, or surface floodwater require Category 3 protocol per IICRC S500-2021 §5.3. Full PPE crews in Tyvek and N95 deploy truck-mounted Hydramaster CDS-4.8 extractors and submersible pumps. Porous materials get controlled demolition, EPA-registered antimicrobial per S520, and framing dried to ANSI/IICRC standard with daily Tramex CME 5 verification.
IICRC S500 §5.3 · Tramex CME 5 verified
Emergency Roof Tarp-Up And Board-Up
Same-day blue-tarp installation across wind-stripped roofs and fallen-tree impact zones on Watertown properties, secured with furring strips and roofing nails, plus emergency board-up of broken windows and breached walls. Weather-tight protection for Downtown Watertown, Oakville, Westside, and Litchfield Road corridor homes after nor'easters and summer thunderstorm downbursts until permanent repairs begin.
Same-day tarp · Weather-tight seal
Fallen Tree And Wind Impact Response
Complete tree-impact response for the mature hardwood canopy across Watertown's Litchfield Hills foothills, Westside wooded ridge parcels, and Oakville residential corridors: debris removal, structural assessment, emergency shoring of compromised framing, and coordination with licensed tree-removal crews. We stabilize the structure first, then move straight into water mitigation where the canopy breached the building envelope.
Structural shoring · Crew coordination
Additional Restoration Services
Steele Brook Flash Flooding
Steele Brook runs through the heart of Downtown Watertown and Oakville and exceeds bank capacity during intense summer thunderstorms and rapid spring snowmelt. Flash surge events push Category 2 and Category 3 stormwater into Oakville mill-era colonials and Downtown Watertown commercial basements. We deploy submersible pumps, extract silt from pre-war foundations, dry framing with LGR dehumidifiers, and document scope for NFIP and homeowners carriers.
Naugatuck River Downstream Surge
The Naugatuck River forms the eastern boundary of Watertown adjacent to Oakville, receiving drainage from the Thomaston Dam (USACE) upstream and Steele Brook inflow from Watertown itself. During prolonged rainfall events, Naugatuck River levels influence groundwater pressure against Oakville commercial and residential foundations along the river corridor. We document FEMA AE Zone base flood elevation reference and file NFIP scope packets within the 60-day deadline.
Black River And Highland Lake Overflow
The Black River draining from Highland Lake in Torrington flows south through the Watertown area, carrying elevated spring snowmelt and dam-release volumes from the Highland Lake watershed. Properties on the Watertown-Torrington border corridor face secondary flooding from this drainage route during compound precipitation events. We extract, treat per S500 §13, and dry the affected assemblies before the 48-hour mold colonization window closes.
Sewer And Backup Cleanup
Municipal sewer surcharge during peak Steele Brook flood events forces Category 3 sewage back-pressure into Downtown Watertown and Oakville basements through floor drains. Full PPE HEPA response, controlled demolition of porous materials, EPA-registered antimicrobial per IICRC S520-2024, and laboratory clearance from an ACAC-independent sampler before any reconstruction begins on your Watertown property.
NFIP Documentation And Insurance Coordination
Every Watertown flood job receives a complete NFIP-formatted scope packet: timestamped photo logs, daily Tramex CME 5 moisture readings, FEMA Map Service Center zone reference, high-water-mark documentation, and an itemized estimate for direct adjuster submission within the 60-day Proof of Loss window. We submit parallel homeowners carrier documentation where sewer backup endorsements apply.
Structural Drying And Mold Prevention
Phoenix Axial commercial movers and LGR dehumidifiers positioned by psychrometric calculation for Watertown's Oakville mill-era colonials, mid-century Westside ranches, and Downtown commercial block basements. Daily Tramex moisture readings logged until ANSI/IICRC S500-2021 dry standard confirmed at every monitoring point across all Steele Brook and Naugatuck-adjacent assemblies.
Don't Wait For Flood Damage To Get Worse. Every Minute Counts.
Steele Brook Flash Flooding, Naugatuck Corridor, And Cat 3 Black Water Specialists For Watertown.
Why The Water Category Decides Everything In A Watertown Flood
Per IICRC S500-2021 §5.3, every flood loss is classified Category 1, 2, or 3 before scope is signed. Category drives demolition extent, antimicrobial protocol, drying timeline, and what your insurance carrier expects to see in the documentation. Most Watertown flooding arrives as Category 2 to 3 depending on the source. Steele Brook stormwater overflow is typically Category 2. Naugatuck River overflow and sewer surcharge are Category 3 on arrival.
Common Sources
Burst supply line, ice maker overflow, sink overflow
Restoration Protocol
Extract, dry, sanitize. Most porous materials salvageable if dried within 24 to 48 hours.
Drying typically 3 to 5 days
Common Sources
Washing machine discharge, dishwasher overflow, toilet overflow without solids, aquarium leak
Restoration Protocol
Extract, antimicrobial pre-treatment, dry, post-clean sanitize. Saturated carpet pad and porous insulation typically discarded.
Drying typically 4 to 7 days
Common Sources
Sewer surcharge, Naugatuck River overflow, Steele Brook flash flooding, Black River drainage, toilet overflow with solids
Restoration Protocol
Full PPE response, controlled demolition of porous materials to sill plate, EPA-registered antimicrobial per IICRC S520-2024, post-treatment clearance sampling.
Restoration typically 7 to 14 days including reconstruction
Why this matters for Watertown, CT
Wind-driven rain that enters through a roof breach can stay Category 1 if treated within hours. The same water becomes Category 2 after 48 hours in a warm cavity, and Category 3 once it contacts standing sewage, soil, or decomposing organic material. In a Watertown flood loss, Naugatuck River overflow is Category 3 on arrival per S500 §5.3 because river water carries industrial drainage, roadway runoff, and storm-sewer pollutants regardless of how clear it looks at the high-water mark along the Oakville corridor.
Our Flood & Storm Damage Restoration Process In Watertown, CT
From the first call to final walkthrough, every step is documented, insured, and owner-supervised.
Why Choose Us In Watertown
Owner-led service with 60-minute response, direct insurance billing, and eco-friendly methods across Watertown.
60-Minute Emergency Response
IICRC-certified crews arrive within 60 minutes, day or night, every day of the year.
Owner-Operated Local Crew
Every job is personally overseen by our owner, from first call to final moisture reading.
Direct Insurance Billing
We bill State Farm, Liberty Mutual, USAA, Travelers, Allstate, and Chubb directly under HIC.0668405.
EPA-Registered Antimicrobials
EPA-registered antimicrobials and Safer Choice cleaning products applied per IICRC S500 and S520 standards.
Watertown Emergency Utility Lines
Stopping water at the source is step 1 of any water-damage scope. Use these verified Watertown lines while our IICRC crew is en route.For life-threatening emergencies (active fire, gas odor, electrical shock), call 911 first.
Water Authority
Connecticut Water
(800) 286-5700
24/7 emergency. Service-line and curb-stop shutoff requests.
Source: ctwater.com
Gas Leak
Eversource Gas (Yankee Gas)
(877) 944-5325
If you smell gas, leave immediately, call 911 first, then this line from a safe location.
Source: eversource.com
Electric Emergency
Eversource Electric
(800) 286-2000
Submerged outlets or wet panel: cut breaker, then call to confirm service drop is safe.
Source: eversource.com
Police (Non-Emergency)
Watertown Police
(860) 945-5200
Sewer-backup Cat-3 claims sometimes need a police report. Call dispatch.
Source: watertownct.org
Numbers verified against public utility and municipal sources. Green Restoration is not affiliated with these agencies. We provide these as a courtesy resource alongside our IICRC water-damage response.
FEMA Flood Zones In Watertown, CT
Your FEMA zone decides whether your mortgage lender requires NFIP coverage, what premium tier you pay, and which Base Flood Elevation determines a covered loss. We document zone designation, BFE, and high-water mark on every Watertown flood scope so adjusters from Wright National Flood, Allstate Flood, and Write-Your-Own carriers have what they need to approve the claim.
1% annual chance floodplain. NFIP required for federally-backed loans.
Affected In Watertown
Steele Brook through Downtown and Oakville; Naugatuck River eastern boundary corridor
NFIP required
Shallow ponding at 1 to 3 feet depth near low-lying drainage.
Affected In Watertown
Low-lying parcels near Steele Brook outflow and Oakville industrial drainage margins; verify parcel at FEMA Map Service Center
NFIP depth-rated
Sheet-flow flooding at 1 to 3 feet depth along stream corridors.
Affected In Watertown
Naugatuck River lower tributary drainage and Steele Brook channel near Route 6 low crossings in Oakville; verify parcel at FEMA Map Service Center
NFIP depth-rated
500-year floodplain or outside mapped 1%. Still 25% of NFIP claims come from Zone X.
Affected In Watertown
Westside, Litchfield Road corridor, upland residential parcels
NFIP optional
Zone definitions sourced from FEMA Flood Map Service Center + 44 CFR Part 64. Verify your property zone before any policy renewal.
Where Flood Zones Hit Hardest In Watertown
Steele Brook FEMA Zone AE corridor and Naugatuck River eastern boundary
500-year floodplain; hillside runoff risk during intense Litchfield Hills storms
Sourced from FEMA Map Service Center FIRM panels for Watertown, CT. Verify your property zone before policy renewal.
The Anatomy Of A Flood Damage Restoration
Every flood loss looks different, but the protocol does not. Below is what a typical Category 2 to 3 basement flood looks like once extraction starts and how Green Restoration sequences the scope. Photos are representative of common Fairfield County flood scenes and are not necessarily from a specific Watertown property.
What A Category 3 Flood Loss Looks Like
The horizontal line marks where standing water sat for hours. Drywall below the line is saturated, plaster behind it has wicked cavity moisture, and porous insulation has begun mold colonization within 24 to 48 hours.
Most Common Loss
Basement Cat 2 to 3
Sump pump failure during nor'easter outage, municipal sewer backflow during sustained rain, and river overflow into below-grade rooms account for ~70% of Fairfield County flood calls. Plaster, fieldstone, and slow-drying cavities trap moisture beyond surface readings.
Typical scope $3,500 to $12,000
Inland Variant
Steele Brook Flash Flood
Brook floodwater into Downtown Watertown and Oakville during intense summer thunderstorms. Steele Brook flash surge events can push Category 2 stormwater into crawl spaces and basement egress within minutes. Combined with Naugatuck River groundwater pressure, Oakville properties face compounding flood exposure during sustained Litchfield Hills rainfall.
Typical scope $3,500 to $12,000
Typical Timeline
7 to 14 Days
Days 1-2: PPE extraction and porous demolition to sill plate. Days 2-4: EPA-registered antimicrobial per IICRC S520-2024. Days 4-8: Phoenix Axial structural drying with daily Tramex CME 5 verification to ANSI/IICRC dry standard. Days 8-14: ACAC clearance + reconstruction.
Daily moisture logs filed with carrier
Documentation
NFIP + Homeowners
Base flood elevation reference from FEMA Map Service Center, timestamped high-water-mark photographs from multiple angles, daily Tramex moisture readings, and a complete IICRC S500 scope packet formatted for both your Write-Your-Own NFIP carrier and your homeowners adjuster.
60-day NFIP Proof of Loss window
Recent Anonymized Watertown Restorations
Downtown Watertown
Steele Brook spring flash surge
- 12 in. standing water in Oakville commercial basement
- 7 days to ANSI/IICRC dry
- Travelers homeowners claim
Oakville
Naugatuck River high-water event + sewer surcharge
- Mill-era colonial lower level
- 9 days to S520 clearance
- NFIP + sewer endorsement claim paid
Westside
Litchfield Hills ridge runoff into basement egress
- 8 in. west-facing basement
- 5 days to ASTM E1745 dry
- Homeowners carrier file
Snapshots are anonymized real Watertown and Litchfield County jobs. Scope ranges typical of Naugatuck Valley and Litchfield Hills brook-flood losses.
What To Do After Flooding In Watertown, CT
Steele Brook flash flooding and Naugatuck River surge require different handling than a clean burst pipe. Follow these IICRC S500 §5.3 protocols while waiting for our crews.
What To Do Immediately
In Steele Brook overflow or Naugatuck River events, leave the property immediately and do not return until Eversource and local emergency services confirm safe access.
NFIP adjusters require timestamped images of the highest visible waterline. Capture from multiple angles before any cleanup begins.
If the panel is dry and reachable without standing in water, shut off main power. If wet, call Eversource emergency first.
Naugatuck River overflow and sewer surcharge are Category 3 by IICRC S500 §5.3. Wear PPE, do not enter without N95 plus gloves.
Federal flood policies require a signed Proof of Loss within 60 days. We document the scope and provide the file.
Our IICRC-certified Litchfield County team typically arrives within 60 minutes with extractors and antimicrobial supplies.
What NOT To Do
Submerged outlets and contaminated water create electrocution and infection risk.
Consumer wet-vacs cannot handle Category 3 volume or biohazard contamination.
Floodwater in ductwork spreads contaminants. Have the system inspected first.
NFIP adjusters require an inventory before contents leave the property.
Raw sewage carries pathogens. Stay out until professional containment is set up.
Mold colonization begins within 48 hours. Every additional day multiplies remediation scope.
The Flood-Control System Behind Watertown
Watertown flood exposure is shaped by Steele Brook running through the downtown core and the Naugatuck River forming the eastern boundary with Oakville, with compounding input from the USACE Thomaston Dam upstream.
Steele Brook Corridor
CT DEEP Stormwater Management + Town of Watertown
Steele Brook runs through the heart of Downtown Watertown and Oakville, carrying FEMA Zone AE designation through portions of its channel. Flash surge events during intense summer thunderstorms can push Category 2 stormwater into basement egress points within minutes.
Naugatuck River Eastern Boundary
USACE New England District + CT DEEP
The Naugatuck River forms the eastern boundary of Watertown adjacent to Oakville and receives Steele Brook inflow along with Thomaston Dam releases from upstream. During prolonged rainfall, Naugatuck River levels influence groundwater pressure against Oakville foundations.
Flood Damage Restoration Coverage In Watertown, CT
Steele Brook overflow, Naugatuck River surge, and Category 3 sewer backup cleanup for Watertown homes and businesses. 60-minute target response across all Watertown neighborhoods.
Green Restoration provides IICRC S500-certified flood damage restoration in Watertown, CT, with deep coverage across neighborhoods most exposed to Steele Brook flash flooding through Downtown and Oakville, Naugatuck River downstream surge, Black River drainage, and municipal sewer surcharge. Downtown Watertown and Oakville sit in FEMA Zone AE along Steele Brook and the Naugatuck River eastern boundary; Westside and Litchfield Road parcels carry Zone X hillside runoff risk. With direct access via Route 8, Route 6, and Route 262 from our Litchfield County location, our IICRC-certified crews target a 60-minute response, day or night.
As a locally owned company based at Serving Watertown and Litchfield County, CT, we know the specific challenges Watertown properties face: Oakville mill-era colonials, mid-century Westside ranch slabs, and Downtown commercial block basements, and the IICRC S500 §5.3 Category 3 protocol every flood requires on arrival. We submit IICRC-standard documentation directly to your insurer. We are not licensed public adjusters and do not negotiate claims on your behalf.
Flood Emergency In Watertown?
Category 3 dispatch and NFIP documentation, 24/7/365.
(860) 222-9498IICRC Certified Firm · Licensed & Insured · CT CT HIC.0668405 · Licensed & Insured In CT · All Insurance Accepted
See typical Watertown flood damage pricing in 60 seconds. Category 1 to 3.
All Towns Served By Green Restoration Of Litchfield County From Our Litchfield County Location For Emergency Flood Damage Restoration & NFIP Documentation.
How Watertown Brook And River Geography Shapes A Flood Scope
Watertown sits on the southern slope of the Litchfield Hills where Steele Brook drains through the downtown core and Oakville before joining the Naugatuck River, which forms the town's eastern boundary. Steele Brook FEMA Zone AE parcels in Downtown and Oakville face recurring flash surge during intense thunderstorms and spring snowmelt from the Litchfield Hills above. The Naugatuck River receiving Steele Brook inflow and Thomaston Dam releases creates compounding flood pressure on Oakville commercial and residential foundations. Watertown housing spans Oakville mill-era colonials, mid-century Westside ranch slabs, and Downtown commercial block basements, each requiring calibrated drying protocol.
24/7 Flood & Storm Damage Response In Watertown, CT
Our IICRC-certified Litchfield County flood crew dispatches to Watertown Category 3 emergencies around the clock. Most Steele Brook and Naugatuck corridor calls are on site within the hour.
Calls answered around the clock. Hydramaster trucks dispatch from our Litchfield County crews within the hour across Watertown.
Full PPE extraction, controlled porous demolition, EPA-registered antimicrobial, structural drying with daily Tramex verification, and ACAC clearance.
We submit IICRC S500 documentation and NFIP-formatted scope packets directly to your carriers. We are not licensed public adjusters.
Every Watertown flood project documented with timestamped logs, daily moisture readings, and a complete scope packet filed within 60 days.
About Green Restoration In Watertown, CT
Your Watertown Flood & Storm Damage Specialists Since 2017
Green Restoration provides IICRC S500 §5.3 flood damage cleanup and structural drying for homes and businesses in Watertown, CT. Our protocol focuses on Category 3 extraction from Oakville mill-era colonials and Downtown Watertown commercial basements, controlled porous demolition, EPA-registered antimicrobial per S520-2024, and NFIP-formatted documentation.
“As the local Franchise Owner across Litchfield County, I bring 15 years in restoration and IICRC AMRT plus WRT certifications to every Watertown flood scope. Steele Brook flash flooding in Oakville and Naugatuck River downstream surge behave differently than a clean burst pipe, and the NFIP documentation has to match what adjusters expect. Every Watertown job gets my direct oversight, documented to S500 standard, billed to your carrier.”
What Is IICRC S500 §5.3 Flood Damage Restoration?
Flood damage restoration is the IICRC S500-2021 §5.3 documented process for Category 3 black water: full PPE response, controlled demolition of porous materials to sill plate, EPA-registered antimicrobial application per IICRC S520-2024, structural drying to ANSI/IICRC dry standard, and lab-verified post-remediation clearance before reconstruction. Naugatuck River overflow and sewer surcharge arrive as Category 3 on contact. Steele Brook stormwater overflow typically arrives as Category 2 but escalates to Category 3 when combined with sewer backflow.
In Watertown, CT, every flood scope is sequenced: 60-minute target dispatch, FLIR thermal mapping and Tramex CME 5 moisture verification, truck-mounted Hydramaster extraction, controlled porous demolition, antimicrobial treatment, Phoenix Axial drying monitored daily, and a carrier-ready scope file with NFIP-formatted documentation, base flood elevation reference, and high-water-mark photographs filed within the 60 days NFIP Proof of Loss window.
- IICRC S500-2021 §5.3 aligned
- IICRC S520-2024 antimicrobial protocol
- ASTM E1745 Class I vapor retarder
- ASHRAE 160 humidity targets
- NFIP-formatted scope packet
- FEMA Map Service Center referenced
The Four Layers Of Flood Coverage In Watertown
NFIP Building
$250,000
single-family cap
NFIP Contents
$100,000
residential cap
FEMA IA Grant
$43,600
+ $43,600 ONA
SBA Home Loan
$500,000
from 2.875%
Your standard CT homeowners policy excludes flood, surface water, tidal overflow, and wave action. NFIP closes the gap with a 30 days waiting period and a 60 days Proof of Loss deadline. Add $30,000 Increased Cost of Compliance for elevation requirements.
Connecticut average NFIP claim payout was $8,727 in 2025 and the average policy premium runs $1,426/year for roughly $272,799 of coverage (per FEMA NFIP and CT Insurance Department data). This information is general education only, not insurance, legal, or coverage advice. We submit IICRC documentation directly to your insurer. We are not licensed public adjusters and do not negotiate, adjust, interpret your policy, or settle claims on your behalf.
How Much Does Flood Damage Restoration Cost In Watertown, CT?
Category 3, River + Sewer Backup
$8,000 to $50,000+
Naugatuck River overflow, sewer surcharge, Category 3 extraction from Oakville mill-era colonials
Category 2, Steele Brook Flash Flood
$3,500 to $12,000
Brook stormwater overflow, snowmelt, light silt in Downtown and Westside ranch slabs
Category 1, Clean Rainwater
$1,500 to $4,500
Rainwater intrusion through wind-created opening
Watertown Flood Damage Restoration FAQs
No. Connecticut homeowner policies explicitly exclude flood, surface water, and brook overflow. Steele Brook overflow into Downtown Watertown and Oakville and Naugatuck River corridor flooding both require a separate NFIP flood policy. What homeowners policies typically cover: sudden and accidental supply-line bursts, appliance overflows, and wind-driven rain through a wind-created opening. Sewer and septic backup is excluded unless you carry a separate backup endorsement. We are not licensed public adjusters and do not negotiate claims on your behalf.
Yes. Parcels along Steele Brook through Downtown Watertown and Oakville carry FEMA Zone AE designation where the brook exceeds bank capacity during sustained rainfall. The Naugatuck River forms the eastern boundary of Watertown adjacent to Oakville and carries AE Zone designation along its corridor. Higher-elevation Westside and Litchfield Road parcels fall in Zone X. Verify your specific parcel zone via FEMA Flood Maps at fema.gov/flood-maps.
NFIP requires you to file a signed Proof of Loss with your Write-Your-Own carrier within 60 days of the date of loss. Green Restoration provides timestamped photo logs, IICRC S500 moisture readings, FEMA Map Service Center zone reference, and a complete itemized scope formatted for direct adjuster submission so Watertown homeowners meet the deadline.
NFIP caps single-family residential coverage at 250,000 dollars building and 100,000 dollars contents. Building and contents carry separate deductibles ranging from 1,000 to 10,000 dollars. NFIP has a 30-day waiting period before coverage begins. Finished basement contents, walls, floors, and ceilings are not covered under a standard NFIP policy.
Category 1 is clean supply-line water. Category 2 is gray water from Steele Brook stormwater overflow requiring antimicrobial treatment. Category 3 is black water including Naugatuck River overflow, sewer surcharge, and Black River drainage. Category 3 requires full PPE response, controlled demolition to sill plate, EPA-registered antimicrobial per IICRC S520-2024, and laboratory clearance. Naugatuck River water is Category 3 on arrival because it carries industrial drainage and storm-sewer pollutants.
