The phrase "a decline in access" is correct and usable in written English.
It can be used when discussing a reduction in the availability or ability to reach something, such as services, resources, or information.
Example: "The recent policy changes have led to a decline in access to healthcare for low-income families."
Alternatives: "a reduction in access" or "a decrease in access".
The study blamed a decline in access to birth control.
That shortage has caused a decline in access to prenatal care, a critical factor in infant mortality and child health.
Among developed nations, the United States ranks last in maternal mortality and infant mortality, largely because of its high rate of untreated chronic disease and a decline in access to obstetrical care, particularly in rural areas.
Suicide and depression rates have dramatically increased in young populations within the past 30 years, and can be linked not to a decline in access to mental health services (although this is an issue that needs dire attention), but to a newly emerging and distorted perception of what "good" mental health means.
Rural households who primarily depend on agricultural production will suffer a decline in food access as a result of poor household production, lack of physical access to food on the market and high food prices.
A recent Arts Council report suggests exactly this – a decline in universal access.
License revenue was up, partially offset by a decline in System Access Fees (SAF).
The reaction progression with time involves increasing amounts of the carbonaceous products, with a corresponding decline in access to the active sites by pore blockage and, as a consequence, with a corresponding decline in the catalytic activity.
And among those who are, there has been a decline in home broadband access over the past few years.
And there's a problem with the FCC's finding - Common wisdom says that there was a decline in copper-based access lines.
One thousand additional job ads on Craigslist were linked to a decline in the fee for access to CVs by $2 per month of access (column 4).
