The cities of Atlanta and Sandy Springs together saw 225 new COVID-19 diagnoses between July 31 and Aug. 3 update reports from the Fulton County Board of Health.

The number of cases increased in all of the main local ZIP codes. The 14-day trend declined in both cities and in all but one of the local ZIP codes.

A chart of COVID-19 diagnoses by city in Fulton County as shown in an Aug. 3 Board of Health report.

As of Aug. 3, the part of Atlanta within Fulton County had 8,145 COVID-19 diagnoses, up from 7,964 on July 31. Sandy Springs had 1,577 diagnoses, up from 1,533.

Atlanta remains the number one city in the county for COVID-19 diagnoses at 45% of the total, and Sandy Springs remained third with 8.7% of the total.

The 14-day trend in new COVID-19 in each city is charted in the report, calculated by comparing the 14 days preceding the previous seven days with the 14-day period before that. In Atlanta, the 14-day trend was down by 46.8% and in Sandy Springs the 14-day trend was down by 33.9%.

To view the full reports, see the county website here.

The report does not state whether the numbers reflect the coronavirus’s spread, the state of testing, or both.

The statistics, which are based on patients’ home addresses, are not completely accurate due to such factors as a large number of patients whose cities or ZIP codes are unknown. Of those diagnosed, their ZIP code was unknown in 733 cases and their home city was unknown in 2,079 cases. All numbers are preliminary and may be adjusted later, including through “data cleaning” — the reassignment of some cases to a different ZIP code or city after further analysis.

The total number of confirmed COVID-19 diagnoses in the county as of Aug. 3 was 18,119, up from 17,634 on July 31. Of those, 398 are reported as having died. About 9.8% of patients were hospitalized and about 2.2% died. Countywide, residents and staff of long-term care facilities account for about 9.2% of diagnoses and 48.5% of deaths.

The number of total diagnosed cases in the main ZIP codes in Buckhead and Sandy Springs between the July 31 and Aug. 3 reports were as follows. The percentage change in the 14-day trend declined significantly in all of the ZIP codes except for 30350, which was up 24.6%.

Buckhead ZIP codes

30305: Total: 525 (up from 511)

30326: Total: 153 (up from 146)

Sandy Springs ZIP codes

30328: Total: 508 (up from 492)

30350: Total: 360 (up from 351)

Buckhead and Sandy Springs combined ZIP codes

30327: Total: 323(up from 317)

30342: Total: 789 (up from 771)