A very large area comprising the communes of two provinces / voivodeships (Podkarpackie and Świętokrzyskie) and four districts: Tarnobrzeg, Stalowa Wola, Sandomierz and Nisko, as well as the city Tarnobrzeg with district status itself. It is located in the north-western part of the Subcarpathian Voivodeship and the south-eastern part of the Świętokrzyskie Voivodeship.

The area is historically of great economic importance on the scale of the whole country, and now the region. It is also characterized by important from the point of view of nature and culture as well as tourist values. It was created by merging the functional areas of four cities, including Tarnobrzeg and Stalowa Wola, which are sub-regional centres for the northern part of the Podkarpackie Voivodeship.

The future SUMP will have to be consistent with the aforementioned documents.

Local Authorities and Local government units implementing a joint supra-local strategyMiasto Tarnobrzeg,
Gmina Baranów Sandomierski
Gmina Gorzyce,
Gmina Grębów,
Gmina Nowa Dęba.
Gmina Sandomierz,
Gmina Dwikozy,
Gmina Obrazów,
Gmina Samborzec,
Gmina Wilczyce,
Gmina Stalowa Wola,
Gmina Bojanów,
Gmina Pysznica,
Gmina Zaleszany,
Gmina Zaklików
Gmina Radomyśl nad Sanem
Gmina i Miasto Nisko.
Road or railway managing authoritiesRegion of Municipal Roads Sp. Z o.o.,
District Roads Authority with its registered office in Samborec,
Subcarpathian and Świętokrzyski Voivodeship Road Authorities,
District Roads Authority in Stalowa Wola,
Stalowa Wola City Hall,
Sandomierz City Hall,
General Directorate for National Roads and Motorways (GDDKiA)
NGOsLocal Action Groups
Local Associations, e.g. Seniors, Rural Housewives, Entrepreneurs
League for Nature Conservation (Tarnobrzeg)
Local Action Group, Nowa Dęba
Polish Association of Pensioners, Pensioners and Invalids, Tarnobrzeg
Polish Tatra Society, Tarnobrzeg Branch
Polish Tourist and Sightseeing Society, Municipal Branch “Siarkopol” in Tarnobrzeg
Tarnobrzeg Regional Development Agency S.A.
ESTEKA Association
Tarnobrzeg Association of Artistic Initiatives “FRAM”
Centre for the Promotion of Entrepreneurship Foundation in Sandomierz
Municipal Council of Seniors, Stalowa Wola
Municipal Women’s Council, Stalowa Wola
Youth City Council, Stalowa Wola
Subcarpathian Association of Road Carriers in Agatówka,
“Sokół” Cycling Club in Stalowa Wola,
Automobile Club Stalowa Wola,
Cyclists of steel
Polish Ecological Club “Friends of the Earth”
Regional Chamber of Commerce, Guild of Craftsmen and Entrepreneurs
Municipal Cultural Centre Stalowa Wola
Educational institutionsPrimary schools, 
Secondary schools, secondary school complexes and technical school complexes,
Branches of universities,
Prof. Stanisław Tarnowski State University of Applied Sciences in Tarnobrzeg,
Vocational Education Centre in Stalowa Wola
Business and institutionsRepresentatives of local companies and institutions
Residents – community leadersRepresentatives of residents