The phrase "a state of deterioration" is correct and usable in written English.
It can be used to describe a condition or situation that is worsening or declining in quality or health.
Example: "The building has fallen into a state of deterioration due to years of neglect and lack of maintenance."
Alternatives: "a condition of decline" or "a phase of decay."
Known for his ascetic life, strict discipline, and martial spirit, he was made (1275) bishop of Hereford, which he found in a state of deterioration.
Biomaterials have played an increasingly prominent role in the success of biomedical devices and in the development of tissue engineering, which seeks to unlock the regenerative potential innate to human tissues/organs in a state of deterioration and to restore or reestablish normal bodily function.
Since the day we were born we've been in a state of deterioration, diminution, and decline.
New York City's Central Park, an oasis that functions as the city's "green lung", was in a state of deterioration in the mid-1970s.
Whilst many retail units are in a state of deterioration, and despite a report describing recent housing development on the east side of Old Durham Road as "poorly handled and unsightly", the area remains "interesting and lively".
After a fire in 2001 and years of water penetration through open roofs, the complex is in a state of extreme deterioration.
While focusing on musicals of the last 25 years, Barry Singer agrees that Broadway is in a state of constant deterioration and that more and more of the musical's creative energy is now found Off Broadway.
"The tower is in a state of serious deterioration," said Ken Lustbader, director of the sacred sites program of the Landmarks Conservancy, the group that helped assess the damage to St. Martin's tower.
The lack of investment in new developments however led to a state of continuous deterioration.
There are indications that the pathway is in a state of rapid deterioration, as has been described for some pathogenic enteric bacteria, for example, in Actinobacillus actinomycetemcomitans [ 6].
By 2013, the paintings were in a serious state of deterioration but a two-year programme of restoration has just been completed and the result is a bit like looking at a pristine Bayeux tapestry through a filter, or a projection of a medieval newsreel.
