There is always a quest to find the locations of more CNG pumps in Delhi so that you can try and get a pump that has a lower queue, or that can pump upto 10 KG in the tank. Here is a link to the Indraprastha Gas Ltd (IGL) map of petrol pumps in Delhi (link).

And here is the actual list:

Sarojani Nagar Dtc Sarojani Nagar,Near Bhikaji Kama Place Dda Flats
Vasant Vihar Dtc Vasant Vihar,Nelson Mandela Marg Market
Okhla I Sirinivas Puribehind Lajpat Nagar Subzi Madi
Okhla Ii Sukhdev Vihar Behind Garhi, Lajpat Nagar 4 Mathura Road
Kalkaji Dtc Near Kaklkaji Extn Road
I. P. Depot Ring Road,Ipestate, Opp. Pragati Power Station Ring Road
Patparganj Near Patparganj Appt Road
Banda Bahadur Marg 1 Mukherjee Nagar, Banda Bahdur Marg Residentrial Appt
Banda Bahadur Marg 2 Mukherjee Nagar, Banda Bahdur Marg Residentrial Appt
Gtk Dtc On Ring Road,Near Gtk Bypass, Nh 1 Sanjay Enclave
Rohini Dtc 1 Rohini Sec 7 Near Rajiv Gandhi Cancer Institute Swarn Jyoti Park
Rohini Dtc 2 Rohini Sec 16
Wazirpur Dtc 1 On Ring Road, Opp. Pitampura Ring Road
Wazirpur Dtc 2 On Ring Road, Opp. Pitampura Ring Road
Mayapuri Dtc On Ring Road, Near Ifc Building Mayapuri Junk Market Road
Hari Nagar Dtc 1 Jail Road, Hari Nagar Jail Road
Hari Nagar Dtc 2 Jail Road, Hari Nagar Jail Road
Peeragarhi Dtc On Outer Ring Road,Peeragarhi Outer Ring Road
East Vinod Nagar Dtc Vinod Nagar, Nh 24
Pragati Maidan, Ring Road Near Who Bldg., Ip Estate Ring Road
Sarai Kale Khan -I On Ring Road, Nera Isbt Ring Road
Sarai Kale Khan -Ii On Ring Road, Nera Isbt Ring Road
Okhla More Mathura Road, In Dda Park, Mathura Road
Nanglamachi Behind Purana Quilla, On Ring Road Ring Road
Crri Mathura Road, Near Crri
Nh-24 On Nh-24, Near Ghazipur More Nh-24(Gazipur)
Patparganj Mega Patpargunj, Nh 24
Sarita Vihar Along Road No-33, Zone-F,Sarita Vihar Del-Noida Road
Madanpur Khader-I Mathura Road,Opp. Mohan Ind. Area Mathura Road
Madanpur Khader-Ii Mathura Road, Opp. Mohan Ind Area Mathura Road
Brar Square On Ring Road, Delhi Cant Ring Road
Punjabi Bagh On Ring Road, Opp. Punjab Keasari Ring Road
R.K.Puram Sec-Xii On Ring Road, Nera Hyatt Hotel Ring Road
R.K Puram Sec-X Opposite Mohan Sing Market, Near Sngam Cinema Residential Area
R.K.Puram Sec-Iii Opposite Jnu More, Outer Ring Road, Near Munirka Ring Road
Sarojini Nagar On Ring Road, Opp. Hayatt Hotel, Bhikaji Kama Place Sarojani Nagar Bus Stand
Rangpuri, Nh-8 On Nh-8 Opp. Radisson Hotel Nh-8
Mahipalpur Rangpuri Pahari Rangpuri Pahari
Nelson Mandela Vasant Kunj, Nelson Mandela Marg Road
Nh-8, Defence On Natiaonal Highway-8 Nh-8
Metcalfe House Near Chandigram Akhara Opp. Trauma Centre, Isbt Metcalf House
Dhirpur I Nera Burari Villag, Outer Ring Road Outr Ring Road
Dhirpur Ii Nera Burari Villag Outer Ring Road Outr Ring Road
Sanjay Gandhi Tpt. Ngr Phase-I Near Gt Karnal Road Bypass, Nh 1 Karnal Road
Sanjay Gandhi Tpt. Ngr Phase-Ii Near Gt Karnal Road Bypass, Nh 1 Karnal Road
Narela G T Road, Near Sindhu Border
Pitam Pura On Ring Road, Near Wazirpur Payal Kesri Printing Press
Shakurpur Shukurpur Basti, Ring Road Brittania Industries
Chatrasal On Mall Road, Opp. Model Town Model Town-111
Rohini Rohini Sec-Xix Tihar Jail
Janak Puri D-Block Rama Road, Janak Puri Road
Mangolpuri On Outer Ring Road, Opp. Mangolpuri Ind Area Outer Ring Road
Peeragarhi On Outer Ring Road, Peeragarhi Industrial Area
Rohini Mega Rohini Sector 23, Kanzaval Road Road Leading To Budh Vihar
Rohtak Road Near Rampura, Rohtak Road Rohtak Road
Paschim Vihar Ramlila Ground, Meera Bagh, Paschim Vihar Don Bosco Public School
Shantipath Site At Shantipath Adjacent To Bpcl Pp Road
San Martin Site At San Martin Marg, Near Maitri College Road
Cgo Complex Near Jlnehru Stadium Road
Jahangir Puri On Ring Road, Near Gtk Bypass Sanjay Enclave
Jasola Near Jasola Sports Complex Indraprastha Apollo – Kalindi Kung Road Del-Noida Road
Mayapuri Phase _I, Junk Market, Near Lajwanti Road
Nanak Pyau On Gt Karnal Road, Opp Nanak Piao Gurudwara Nanak Piao Gurudwara
Nehru Place Nehru Place, Outer Ring Road
Mayur Vihar Mayur Vihar-1, New Delhi Road
Okhla Industrial Area-I Okhla Ph 1
Udyan Marg Mandir Marg, Scindia Road Mandir Marg
Janakpuri Distt Centre Near Janakpuri Telephone Exchange, Janak Puri Dda Bldg
Lado Sarai Laddo Sarai Village, Zone-F Road
Pushpa Bhawan Outer Ring Road Road
Dilshad Garden Ofc Pocket, Tiharpur Gtb Road
Nand Nagari Near Gagan Cinema, Wazirabad Road Ibp Pump
Cbd Shahadra Near Karkar Dooma District Court, Shahdara Cbd Complex
Loni Road Near Gokulpuri Chowk Wazirabad Road Dda Mig Flats
Geeta Colony Pusta Road, Geeta Colony Road
Kapashera Site At Vicnity Of Kapashera Toll Tax Post, With In Boundary Of Tt Post Toll Tax Post
Dwarika Dwarka Sec-Ix Road
Military Road, Anand Parbat Site At Military Road, Dev Nagar Inside Facilities Area Residential Area
Arawali S/S V & Po Rajokar Chowk, Kapashera Nh-8
Syall Kirti Nagar, Area Opp Ware Housing Scheme Ware House
New United S/S Near Gail Bhawan, Bhikaji Kama Place
Sidhu S/S G T Road, Azadpur
Nemichand Tarachand Alipur, G T Road
Gymkhana S/S Club Road , Near Race Course Race Course Road
G.S.Bhasin Mathura Road, Ashram Mathura Road
Deepak Automobile Railway Crossing, Vivek Vihar, On Gt Road Gt Road
Mukul Diesel Near Loni Tpt. Authority,Wazirabad Road
Veejay Near Vaishnov Devi Mandir,Kali Das Marg, Near Gulabi Baugh Vaishnov Devi Mandir
Vaibhav Near Vikaspuri Police Station, Vikaspuri Shiv Shati Mandir
Budh Singh Gulab Singh Lsc, Gulabi Bagh, Near Vshakti Nagar Road
Rajendra S/S Near Isbt, On Shamnath Marg Mcd Garden
Saksham S/S Mayapuri Road
Auto Rink S/S Lal Kua, Mehrauli Badarpur Road
Autogrid S/S Mehrauli Badarpur Road
Sansar S/S Dwarika Sec 8
R.S. Bhola Ram On Shamnath Marg, Near I P College Shamnath Marg
Bagga Link Link Road Near Connought Place
Vinod Palam Airport Terminal 2 Air Port Road
Bhatia S/S Ring Road, 4 Factory Road, Near Safdarjung Hospital Ring Road
Sethi, Nh-8 Nh-8, Mahipal Pur Nh-8
Superauto Centre Sriniwas Puri, New Delhi, Ring Road Ring Road
I.P. Service Station Near C-Power House, Ip Estate Ring Road Ring Road
Surya Service Station Ring Road, Jangpura Road
Speedways Hari Nagar,West Delhi
Amar Shahid S/S Rohini Sec 7, Behind Rajiv Gandhi Cancer Hospital
Kapoor Auto S/S Kapoor Enterprises, East Vinod Nagar, Patparganj , Road
Jindal Service Station Mathura Road, Near Okhla Tele-Exchange,Opp Ishwar Nagar Mathura Road
Arora Service Station Pitam Pura, Near Metro Station
Ajit Service Station Delhi Cant, Near Cant Raiway Station
Shivalik S/S Dwarika Sec 3
Pragati Service Station Jawaharlal Nehru Marg,Minto Road Road
Kingsway S/S On Mall Road Near Du, Ring Road Du Hostel
Siwesh Saomi Nagar, Near Malviya Nagar Road
Anand Service Station Hemkund, Near Lodhi Hotel, Jangpura Extn Nh-8
Rajeev S/S Sunder Nagar, Near Zoo Road
Hemkunt Near Lodhi Hotel, Jangpura Extn Road
Evergreen Opp Gren Park, Mehrtauli Road, Delhi-16 Market
Chadda S/S Delhi Gate, Opp. Maulana Azad Medical College
Bedi Race Course Club Road Race Course Road
Automotive S/S Lodi Road New Delhi Lodhi Road
Savita Filling Station Opposite Skk Isbt
Rakesh Filling Station Near Cellular Jail, Rohini, Outer Ring Road
Aman Fill Point Mayur Vihar-1, New Delhi Nh-24
R N Soins S/S Darya Gunj Near Red Fort
Car Care Rk Puram Sec-3 Road
Nandnagri Dtc Depot Nandnagri Dtc Depot, Wazirabad Road, Nandnagri, Delhi