Health Minister Satyendar Jain had said last week that the increase in the number of containment zones is a part of Delhi's strategy to tackle the spread of the virus.
According to the government, Northwest district had a maximum of 870 cases where symptomatic antigen negatives were not followed up with an RT-PCR test by Wednesday.
Senior officials said that resources should have been used rationally and more focus should be on awareness campaigns and free masks distribution instead of fixing daily targets to collect challans.
According to the Delhi government, there are currently 435 mohalla clinics in the city of which 400 are presently functional.
Between September 6 and 15, the city recorded over 4,000 daily fresh cases on six days, with September 16 registering 4,473 infections, the highest single-day spike so far.
The Delhi government and hospital administration had claimed that many of these are from adjoining areas of the national capital.
The total number of tests conducted in the same period was 45,797, it said, adding that the positivity rate in the last 24 hours stands at 7.8 percent.
Satyendar Jain said the Delhi government wants to ensure there is no positive case in the city and is therefore increasing the daily testing for COVID-19.
On Tuesday, Delhi recorded the highest single-day spike in cases in August at 1,544, surpassing Sunday's figure of 1,450.
According to the bulletin, 10,133 tests -- 3,904 RTCPR and 6,229 Rapid Antigen -- were conducted in the last 24 hours.
According to authorities, the COVID-19 recovery rate in Delhi has increased to over 89 per cent, while the case positivity rate in the last 24 hours was 7.54 per cent.
RT-PCR is one of the most common tests for detection of COVID-19. India follows the method of nasopharyngeal swabs collection for COVID-19 test.
Delhi records 613 fresh COVID-19 cases as national capital's tally crosses 1.31 lakh mark, death toll reaches 3,853
Twenty-six fatalities have been recorded in the last 24 hours, a Delhi health department bulletin released on Monday afternoon showed.
The city recorded 605 deaths due to the viral disease between July 1 and 12 as against 1,089 fatalities during the same period in June, according to an analysis carried out by the Health Department.
The number of active cases is 11,904 now, against 12,657 on Saturday, 13,681 on Friday, 14,554 on Thursday and 14,954 on Wednesday, according to health department bulletins.