diff --git a/opm/input/eclipse/Schedule/Well/Well.hpp b/opm/input/eclipse/Schedule/Well/Well.hpp
index 91c0d9287..86d683f61 100644
--- a/opm/input/eclipse/Schedule/Well/Well.hpp
+++ b/opm/input/eclipse/Schedule/Well/Well.hpp
@@ -484,8 +484,8 @@ public:
     bool handleWINJCLN(const DeckRecord& record, const KeywordLocation& location);
     bool handleWINJDAM(const DeckRecord& record, const KeywordLocation& location);
     bool handleWINJMULT(const DeckRecord& record, const KeywordLocation& location);
-    void setFilterConc(const double conc);
-    double getFilterConc() const;
+    void setFilterConc(const UDAValue& conc);
+    double evalFilterConc(const SummaryState& summary_sate) const;
     bool applyGlobalWPIMULT(double scale_factor);
 
     void filterConnections(const ActiveGridCells& grid);
@@ -603,7 +603,7 @@ private:
     double well_temperature;
     InjMultMode inj_mult_mode = InjMultMode::NONE;
     std::optional<InjMult> well_inj_mult;
-    double m_filter_concentration = 0.;
+    UDAValue m_filter_concentration;
 };
 
 std::ostream& operator<<( std::ostream&, const Well::WellInjectionProperties& );
diff --git a/src/opm/input/eclipse/Schedule/KeywordHandlers.cpp b/src/opm/input/eclipse/Schedule/KeywordHandlers.cpp
index 05f3a5fb0..be7fa56e5 100644
--- a/src/opm/input/eclipse/Schedule/KeywordHandlers.cpp
+++ b/src/opm/input/eclipse/Schedule/KeywordHandlers.cpp
@@ -2002,9 +2002,8 @@ Well{0} entered with 'FIELD' parent group:
             const auto well_names = this->wellNames(wellNamePattern, handlerContext);
             for (const auto& well_name: well_names) {
                 auto well = this->snapshots.back().wells(well_name);
-                const auto filter_conc = record.getItem<ParserKeywords::WINJFCNC::VOL_CONCENTRATION>().get<double>(0);
-                // the unit is ppm_vol
-                well.setFilterConc(filter_conc/1.e6);
+                const auto filter_conc = record.getItem<ParserKeywords::WINJFCNC::VOL_CONCENTRATION>().get<UDAValue>(0);
+                well.setFilterConc(filter_conc );
                 this->snapshots.back().wells.update(std::move(well));
             }
         }
diff --git a/src/opm/input/eclipse/Schedule/Well/Well.cpp b/src/opm/input/eclipse/Schedule/Well/Well.cpp
index 508f709d4..eec217798 100644
--- a/src/opm/input/eclipse/Schedule/Well/Well.cpp
+++ b/src/opm/input/eclipse/Schedule/Well/Well.cpp
@@ -51,6 +51,7 @@
 #include <opm/input/eclipse/Deck/DeckKeyword.hpp>
 
 #include "../MSW/Compsegs.hpp"
+#include "../eval_uda.hpp"
 
 #include <cassert>
 #include <cmath>
@@ -536,7 +537,7 @@ Well Well::serializationTestObject()
     result.m_pavg = PAvg();
     result.well_temperature = 10.0;
     result.well_inj_mult = InjMult::serializationTestObject();
-    result.m_filter_concentration = 0.1;
+    result.m_filter_concentration = UDAValue::serializationTestObject();
 
     return result;
 }
@@ -1763,10 +1764,10 @@ bool Opm::Well::aciveWellInjMult() const {
 }
 
 
-void Opm::Well::setFilterConc(const double conc) {
+void Opm::Well::setFilterConc(const UDAValue& conc) {
     this->m_filter_concentration = conc;
 }
 
-double Opm::Well::getFilterConc() const {
-    return this->m_filter_concentration;
+double Opm::Well::evalFilterConc(const SummaryState& summary_sate) const {
+    return UDA::eval_well_uda(this->m_filter_concentration, this->name(), summary_sate, 0.);
 }
\ No newline at end of file
diff --git a/src/opm/input/eclipse/share/keywords/900_OPM/W/WINJFCNC b/src/opm/input/eclipse/share/keywords/900_OPM/W/WINJFCNC
index 067233a41..98b8ef6fa 100644
--- a/src/opm/input/eclipse/share/keywords/900_OPM/W/WINJFCNC
+++ b/src/opm/input/eclipse/share/keywords/900_OPM/W/WINJFCNC
@@ -10,8 +10,8 @@
     },
     {
       "name": "VOL_CONCENTRATION",
-      "value_type": "DOUBLE",
-      "dimension": "1",
+      "value_type": "UDA",
+      "dimension": "PPM",
       "default" : 0
     }
   ]