GHMC Storm Water Drain Zone

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Nala & Drainage Proximity Check

GHMC Storm Water Drain Zone Check

Click the map to check distance to the storm-water drainage / nala network · G.O.Ms.No.168 buffer setbacks · Nala Buffer Zone Check · HYDRAA Risk Assessment

Click on the map to check storm-water drain / nala proximity
Checking drainage network...

What is the GHMC Storm Water Drain Network?

Hyderabad's Storm Water Drain (SWD) network is one of the largest urban drainage systems in India, spanning over 1,400 km of drains and 185+ km of major nalas (open channels). The network is managed by GHMC's SWD Wing and is responsible for draining rainwater from the city into the Musi River and its tributaries. Major nalas like Balkapur Nala, Kukatpally Nala, and Banda Cheruvu Nala carry massive volumes of water during monsoon. Encroachments on these drains have caused devastating floods, most notably the October 13, 2020 Hyderabad floods that killed 33 people and caused over Rs 5,000 crore in damage.

Nala Buffer Zone (9m Minimum)

GHMC mandates a minimum 9-meter (30ft) buffer from the center of major nalas. No construction is permitted within this buffer zone. For secondary drains, the buffer is 3-6 meters depending on the drain width. GHMC BPS (Building Permission System) automatically rejects applications within these buffer zones.

2020 Hyderabad Floods

On October 13, 2020, Hyderabad received 192mm of rainfall in just 3 hours. 33 people died, 300+ colonies were submerged, and damage exceeded Rs 5,000 crore. Areas near encroached nalas suffered the worst. This catastrophic event led to intensified nala clearance drives and HYDRAA enforcement.

GHMC BPS Integration

The SWD alignment is now integrated into GHMC's Building Permission System (BPS). When you apply for building permission, the system automatically checks if the plot falls within the nala buffer zone. Applications within the buffer are rejected at the system level without manual intervention.

Pre-Monsoon Nala Clearance

Every year before monsoon (April-June), GHMC SWD Wing conducts massive desilting and encroachment removal drives across all nalas. Heavy machinery removes silt, debris, and illegal structures obstructing drain flow. Properties on nala beds face demolition during these annual drives.

HYDRAA + SWD Joint Drives

Since 2024, HYDRAA and the GHMC SWD Wing conduct joint demolition drives targeting permanent structures built on nala beds and within buffer zones. These drives have resulted in demolition of multi-story buildings, commercial complexes, and residential structures across Hyderabad.

SWD Right of Way (RoW)

GHMC has proposed widening several major nalas to increase flood carrying capacity. Properties in the proposed Right of Way will be acquired by the government. Even if your property is currently outside the buffer zone, it may fall within the proposed widened nala alignment. Check GHMC SWD records for proposed widening plans.

SWD Risk Assessment Reference

Risk Level Condition Building Permission Action Required
Nala Encroachment Property on nala bed or within buffer zone Will NOT be granted. GHMC BPS auto-rejects. Do not buy. GHMC/HYDRAA will demolish. Structure is illegal regardless of any permissions held.
Buffer Zone Violation Within 9m of major nala or within required setback Rejected by GHMC BPS Existing buildings may receive demolition notices. Flood risk is very high with annual inundation likely.
Flood Risk Zone 9-15m from major nala or area with flooding history May require NOC from SWD Wing Higher floor level mandatory (plinth above high flood level). Property value 10-20% below market.
Minor Impact 15-30m from nala or near minor/covered drain Standard setbacks apply Low flood risk if drain maintained. Verify if property is in SWD Right of Way for proposed widening.
Safe Zone More than 30m from nala or no drain nearby Standard GHMC permissions No SWD-related restrictions. Standard due diligence. Confirm with GHMC BPS before construction.

Major Nalas in Hyderabad SWD Network

Hyderabad's SWD network drains into the Musi River through these major nalas. Properties near these primary drains face the highest flood risk and strictest buffer zone requirements. The 9-meter buffer zone applies to all of these nalas.

Musi River (Main Drain)
Balkapur Nala
Kukatpally Nala
Banda Cheruvu Nala
Nakkavagu
Esa Nala
Palem Cheruvu Nala
Peer Jughni Nala

Known Flood-Prone Areas in Hyderabad

These areas have experienced significant flooding during the 2020 Hyderabad floods and/or face recurring monsoon flooding due to proximity to nalas and inadequate drainage infrastructure. Property buyers should exercise extreme caution in these localities.

Falaknuma
Chandrayangutta
Hafiz Baba Nagar
Nadeem Colony
Meerpet
Saroornagar
Hayathnagar
Erragadda
Borabanda
Kukatpally
Moosapet

How to Verify SWD Risk Before Buying Property

Check GHMC SWD Maps

Visit GHMC office and request the SWD alignment map for your area. The SWD Wing maintains maps showing all nala alignments, buffer zones, and proposed widening corridors. Cross-check the property location against these maps before purchasing.

Measure Distance from Nala

Commission a survey to measure the exact distance from the property boundary to the nearest nala center line. For major nalas, you need at least 9 meters clearance. For secondary drains, 3-6 meters. Document this measurement for building permission applications.

Apply for GHMC BPS

Before purchasing, check if the property can obtain building permission through GHMC BPS. The system automatically rejects applications in nala buffer zones. A successful BPS application confirms the property is outside restricted SWD zones.

Visit During Monsoon

Visit the property during heavy monsoon rains (July-September) to observe actual water levels, drainage patterns, and waterlogging. Ask neighbours about flooding history. Properties that appear dry in summer may be completely submerged during monsoon.

Related Verification Tools

HYDRAA Risk Assessment

Assess demolition risk from FTL zones and water bodies

Survey Boundary Viewer

View exact land parcel boundaries on satellite map

GO 111 Zone Check

Check Osmansagar/Himayatsagar catchment restrictions

Understanding GHMC Storm Water Drain Zones and Their Impact on Property in Hyderabad

What is the GHMC Storm Water Drain (SWD) Network?

The GHMC Storm Water Drain (SWD) network is Hyderabad's primary urban drainage infrastructure, responsible for channeling rainwater from the city into the Musi River and its tributaries. The network spans over 1,400 km of total drains, including 185+ km of major nalas (primary open channels), hundreds of kilometers of secondary drains, and thousands of tertiary drains and box drains. The SWD Wing of GHMC manages this massive network, conducting annual maintenance, desilting, and encroachment removal.

The major nalas in Hyderabad include Balkapur Nala, Kukatpally Nala, Banda Cheruvu Nala, Nakkavagu, Esa Nala, Palem Cheruvu Nala, and Peer Jughni Nala. These primary drains are wider than 6 meters and carry the largest volume of storm water. All of these nalas eventually drain into the Musi River, which is the main drainage channel for Hyderabad.

Nala Buffer Zone Requirements and Building Restrictions

GHMC has established mandatory buffer zones around all nalas and storm water drains to prevent encroachment and ensure unobstructed water flow. For major nalas (width greater than 6 meters), the minimum buffer is 9 meters (30 feet) from the center of the nala. For secondary drains (3-6 meters wide), the buffer is 3-6 meters depending on the specific drain width. No construction of any kind is permitted within these buffer zones.

The GHMC Building Permission System (BPS) now has the SWD alignment data integrated directly into its software. When a building permission application is submitted, the system automatically checks if the property falls within any nala buffer zone. If it does, the application is rejected at the system level without manual intervention. This means that even if a property owner has a registered sale deed and clear title, they cannot obtain building permission if the property is within a nala buffer zone. This integration has been a major step in preventing new encroachments on the SWD network.

The 2020 Hyderabad Floods and Their Aftermath

On October 13, 2020, Hyderabad experienced its worst flooding in decades. The city received approximately 192mm of rainfall in just 3 hours, overwhelming the SWD network. 33 people died, over 300 colonies were submerged, and total damage exceeded Rs 5,000 crore. Areas near encroached nalas — Falaknuma, Chandrayangutta, Hafiz Baba Nagar, Nadeem Colony, Meerpet, Saroornagar, and Hayathnagar — were devastated. Entire neighbourhoods were under 6-8 feet of water for days.

The 2020 floods exposed the catastrophic consequences of decades of nala encroachment. Storm water that should have flowed through wide nalas was blocked by thousands of illegal structures, causing water to back up and flood surrounding areas. After the floods, the Telangana government ordered comprehensive nala surveys and intensified encroachment removal. This eventually led to the creation of HYDRAA in 2024, which now conducts joint drives with the GHMC SWD Wing to demolish permanent structures on nala beds.

HYDRAA and SWD Wing Joint Enforcement

Starting in 2024, HYDRAA (Hyderabad Disaster Response and Asset Monitoring Agency) began conducting joint demolition drives with the GHMC SWD Wing specifically targeting nala encroachments. These drives focus on permanent structures — multi-story buildings, commercial complexes, compound walls, and residential houses — built directly on nala beds or within buffer zones. Unlike previous drives that primarily removed temporary encroachments and debris, the HYDRAA-SWD joint drives use heavy machinery to demolish concrete and steel structures.

Properties identified as nala encroachments are treated as illegal structures regardless of any building permissions or sale deeds held by the owner. The legal position is that building permissions should never have been issued for land within the nala alignment, and any such permissions are considered void. Property owners on nala beds have virtually no legal recourse against demolition.

Step-by-Step: How to Check SWD Risk Before Buying Property

  1. Identify Nearby Nalas — Visit the property site and physically identify any open nalas, covered drains, or drainage channels within 100 meters. Ask neighbours about the nearest major nala and flooding history.
  2. Check GHMC SWD Maps — Visit the GHMC SWD Wing office in your zone and request the nala alignment map. This shows the exact center line and buffer zone of all classified drains in the area.
  3. Commission a Survey — Hire a licensed surveyor to measure the exact distance from your property boundary to the nearest nala center line. Document this measurement with photographs and coordinates.
  4. Verify on GHMC BPS — Submit a preliminary building permission inquiry through GHMC BPS to check if the system flags the property as within a nala buffer zone. System rejection confirms SWD zone violation.
  5. Check Revenue Records — Download Pahani records from Bhu Bharati and verify the land classification. Land classified as "nala", "drain", or "government drain" cannot be privately owned.
  6. Download EC — Use our EC Download (IGRS) tool to check for any government acquisition orders or encumbrances related to SWD widening or nala clearance.
  7. Visit During Heavy Rain — Visit the property during a heavy monsoon downpour (July-September) to observe actual water flow, drainage capacity, and flooding patterns in the area.

Key Takeaway

Buying property near GHMC storm water drains in Hyderabad carries significant risk. Properties on nala beds or within buffer zones are illegal and face demolition by GHMC SWD Wing and HYDRAA. Building permission will not be granted by the GHMC BPS system for properties in buffer zones. Even properties 9-15 meters from major nalas face high flood risk, reduced property values (10-20% below market), and may require special NOC from the SWD Wing. Before purchasing any property in Hyderabad, especially in flood-prone areas or near visible drains, verify the SWD alignment, measure the nala distance, and confirm building permission eligibility. The cost of verification is negligible compared to losing a property to demolition or recurring flood damage.

Frequently Asked Questions

What is the GHMC storm water drain buffer zone and how far must my property be from a nala?
GHMC mandates a minimum 9-meter (30-foot) buffer from the center of major nalas (primary drains wider than 6 meters). For secondary drains (3-6 meters wide), the buffer is 3-6 meters depending on the specific drain width. For minor/tertiary drains (less than 3 meters), the buffer varies but is typically at least 1.5-3 meters. No construction of any kind is permitted within these buffer zones. The buffer is measured from the center line of the nala, not from the edge of the water flow.
Can I get building permission from GHMC if my property is near a nala?
It depends on the exact distance. If your property falls within the nala buffer zone (9 meters for major nalas, 3-6 meters for secondary drains), the GHMC Building Permission System (BPS) will automatically reject your application. The SWD alignment data is integrated into BPS, so there is no way to bypass this check. If your property is outside the buffer zone but within 15 meters, you may need a No Objection Certificate (NOC) from the SWD Wing, and your building plan may require a higher plinth level (above the high flood level). Properties more than 15 meters from nalas typically face no SWD-related restrictions for building permission.
What happened during the 2020 Hyderabad floods and which areas were affected?
On October 13, 2020, Hyderabad received approximately 192mm of rainfall in just 3 hours, causing the worst urban flooding in decades. 33 people died, over 300 colonies were submerged, and total damage exceeded Rs 5,000 crore. The worst-affected areas included Falaknuma, Chandrayangutta, Hafiz Baba Nagar, Nadeem Colony, Meerpet, Saroornagar, Hayathnagar, Erragadda, Borabanda, Kukatpally, and Moosapet. These areas were near encroached nalas where water flow was blocked by illegal structures, causing massive backflow and flooding.
Can GHMC or HYDRAA demolish my property if it is on a nala bed?
Yes. Properties on nala beds are considered illegal encroachments on public drainage infrastructure. GHMC SWD Wing conducts annual pre-monsoon clearance drives that include demolition of structures on nala beds. Since 2024, HYDRAA conducts joint drives with the SWD Wing using heavy machinery to demolish even permanent multi-story structures. Building permissions, sale deeds, and other documents do not protect properties on nala beds because the land itself is classified as drainage infrastructure and cannot be legally owned or built upon.
What is the SWD Right of Way (RoW) and how does it affect my property?
The SWD Right of Way (RoW) refers to the land area that GHMC has designated for the existing or proposed storm water drain alignment. GHMC has proposed widening several major nalas to increase their flood-carrying capacity. Properties that currently fall outside the existing buffer zone may end up within the proposed widened nala RoW. If your property is in the proposed RoW, it may be acquired by the government for nala widening. Check with the GHMC SWD Wing office for proposed widening plans in your area before purchasing property.
How do I find out if there is a nala or storm water drain near my property?
There are several methods: (1) Physically visit the property site and look for open nalas, covered drains, or drainage channels within 100 meters; (2) Ask local residents and neighbours about nearby drains and flooding history; (3) Visit the GHMC SWD Wing office in your zone and request the nala alignment map for your area; (4) Check Google Maps satellite view for visible nala channels; (5) Use our Survey Boundary Viewer to check your property's survey boundaries and identify nearby drainage features; (6) Check Pahani records for land classification — if adjacent survey numbers are classified as "nala" or "drain", there is a drainage channel nearby.
Does flooding risk affect property values in Hyderabad?
Yes, significantly. Properties in flood-prone areas or near nalas typically see 10-20% lower market values compared to similar properties in non-flood areas. After the 2020 floods, property values in worst-affected areas like Chandrayangutta, Hafiz Baba Nagar, and Falaknuma dropped sharply. Insurance costs are higher for flood-prone properties, and some insurance companies refuse coverage entirely. Home loan banks also conduct flood risk assessment and may reject loans for properties in identified flood zones or nala buffer areas.
What is the difference between a covered drain (box drain) and an open nala?
An open nala is an uncovered drainage channel where water flows in the open. These are the most visible and easiest to identify. A covered drain (box drain) is a storm water drain that has been enclosed in a concrete box structure, often with a road or path built on top. While covered drains are less visible, they still require buffer zones and carry the same legal restrictions. Properties built directly on top of covered drains are still considered encroachments. GHMC maintains records of all covered drain alignments. The key difference for property buyers is that covered drains are harder to identify visually, making it essential to check GHMC SWD maps rather than relying on physical observation alone.