diff --git a/src/components/common/cqlFilters.tsx b/src/components/common/cqlFilters.tsx
index c2c55de9..e614023e 100644
--- a/src/components/common/cqlFilters.tsx
+++ b/src/components/common/cqlFilters.tsx
@@ -7,6 +7,7 @@ import { dateDefault } from "./constants";
 import { Feature, Polygon, GeoJsonProperties } from "geojson";
 import * as wellknown from "wellknown";
 import { Category } from "./store/componentParamReducer";
+import { DatasetFrequency } from "./store/searchReducer";
 
 // TODO: refactor this, naming like this is not ideal for readability,
 //  what are T, J, R, p, i , j, c, d, x, y, z, etc. actually mean?
@@ -23,6 +24,7 @@ export type CategoriesIn = SingleArgumentFunction<
   Array<Category>,
   string | undefined
 >;
+export type UpdateFrequency = SingleArgumentFunction<DatasetFrequency, string>;
 /**
  * common key is the search text input that belongs to both "suggest_phrases" and "discovery_parameters". e.g. temperature
  * the OGC API needs to query this type of search text input differently;
@@ -42,7 +44,11 @@ export type FilterTypes =
   | CategoriesIn
   | TemporalDuring
   | TemporalAfterOrBefore
-  | PolygonOperation;
+  | PolygonOperation
+  | UpdateFrequency;
+
+const funcUpdateFrequency: UpdateFrequency = (freq: DatasetFrequency) =>
+  `update_frequency='${freq}'`;
 
 const funcTemporalAfter: TemporalAfterOrBefore = (s: number) =>
   `temporal AFTER ${dayjs(s).format(dateDefault["DATE_TIME_FORMAT"])}`;
@@ -127,6 +133,6 @@ cqlDefaultFilters
   .set("AFTER_TIME", funcTemporalAfter)
   .set("BEFORE_TIME", funcTemporalBefore)
   .set("INTERSECT_POLYGON", funcIntersectPolygon)
-  .set("REAL_TIME_ONLY", "update_frequency='real-time'");
+  .set("UPDATE_FREQUENCY", funcUpdateFrequency);
 
 export { cqlDefaultFilters };
diff --git a/src/components/common/filters/AdvanceFilters.tsx b/src/components/common/filters/AdvanceFilters.tsx
index 35a21f28..adde03f4 100644
--- a/src/components/common/filters/AdvanceFilters.tsx
+++ b/src/components/common/filters/AdvanceFilters.tsx
@@ -5,6 +5,7 @@ import {
   updateCategories,
   updateDateTimeFilterRange,
   updateImosOnly,
+  updateUpdateFreq,
 } from "../store/componentParamReducer";
 import store, { AppDispatch, getComponentState } from "../store/store";
 import {
@@ -70,31 +71,34 @@ const AdvanceFilters: FC<AdvanceFiltersProps> = ({
   }, []);
 
   // TODO: implement DataDeliveryModeFilter and DepthFilter when backend supports this query
-  const handleApplyFilter = useCallback(() => {
-    if (filter.dateTimeFilterRange) {
-      dispatch(updateDateTimeFilterRange(filter.dateTimeFilterRange));
-    } else {
-      dispatch(updateDateTimeFilterRange({}));
-    }
-    if (filter.categories) {
-      dispatch(updateCategories(filter.categories));
-    } else {
-      dispatch(updateCategories([]));
-    }
-    if (filter.isImosOnlyDataset) {
-      dispatch(updateImosOnly(filter.isImosOnlyDataset));
-    } else {
-      dispatch(updateImosOnly(false));
-    }
-    setShowFilters(false);
-    setFilter({});
-  }, [
-    dispatch,
-    filter.categories,
-    filter.dateTimeFilterRange,
-    filter.isImosOnlyDataset,
-    setShowFilters,
-  ]);
+  const handleApplyFilter = useCallback(
+    (filter: ParameterState) => {
+      // Must use await so that it happen one by one, otherwise the update will be messed
+      if (filter.dateTimeFilterRange) {
+        dispatch(updateDateTimeFilterRange(filter.dateTimeFilterRange));
+      } else {
+        dispatch(updateDateTimeFilterRange({}));
+      }
+      if (filter.categories) {
+        dispatch(updateCategories(filter.categories));
+      } else {
+        dispatch(updateCategories([]));
+      }
+      if (filter.isImosOnlyDataset) {
+        dispatch(updateImosOnly(filter.isImosOnlyDataset));
+      } else {
+        dispatch(updateImosOnly(false));
+      }
+      if (filter.updateFreq) {
+        dispatch(updateUpdateFreq(filter.updateFreq));
+      } else {
+        dispatch(updateUpdateFreq(undefined));
+      }
+      setShowFilters(false);
+      setFilter({});
+    },
+    [dispatch, setShowFilters]
+  );
 
   return (
     <>
@@ -205,7 +209,7 @@ const AdvanceFilters: FC<AdvanceFiltersProps> = ({
                         backgroundColor: color.blue.darkSemiTransparent,
                       },
                     }}
-                    onClick={handleApplyFilter}
+                    onClick={() => handleApplyFilter(filter)}
                   >
                     Apply
                   </Button>
diff --git a/src/components/common/filters/DataDeliveryModeFilter.tsx b/src/components/common/filters/DataDeliveryModeFilter.tsx
index 3fbbe495..316462dd 100644
--- a/src/components/common/filters/DataDeliveryModeFilter.tsx
+++ b/src/components/common/filters/DataDeliveryModeFilter.tsx
@@ -1,8 +1,9 @@
-import { FC, useCallback, useState } from "react";
+import { FC, useCallback, useEffect, useState } from "react";
 import { Grid, SxProps, Theme } from "@mui/material";
 import { StyledToggleButton } from "../buttons/StyledToggleButton";
 import { StyledToggleButtonGroup } from "../buttons/StyledToggleButtonGroup";
 import { ParameterState } from "../store/componentParamReducer";
+import { DatasetFrequency } from "../store/searchReducer";
 
 interface DataDeliveryModeFilterProps {
   filter: ParameterState;
@@ -10,7 +11,24 @@ interface DataDeliveryModeFilterProps {
   sx?: SxProps<Theme>;
 }
 
-const DELIVERY_MODES = ["Real-time", "Delayed", "One-off"];
+const DELIVERY_MODES = new Map<string, DatasetFrequency>([
+  ["Real-time", DatasetFrequency.REALTIME],
+  ["Delayed", DatasetFrequency.DELAYED],
+  ["Other", DatasetFrequency.OTHER],
+]);
+
+const findDeliveryModesLabel = (
+  mode: DatasetFrequency | undefined
+): string | undefined => {
+  if (mode) {
+    for (const [key, val] of DELIVERY_MODES) {
+      if (val === mode) {
+        return key;
+      }
+    }
+  }
+  return undefined;
+};
 
 const DataDeliveryModeFilter: FC<DataDeliveryModeFilterProps> = ({
   filter,
@@ -18,10 +36,36 @@ const DataDeliveryModeFilter: FC<DataDeliveryModeFilterProps> = ({
   sx,
 }) => {
   // TODO: implement DataDeliveryModeFilter when backend supports this query
-  const [values, setValues] = useState<Array<string>>([]);
-  const handleChange = useCallback((_: any, newAlignment: any) => {
-    setValues(newAlignment);
-  }, []);
+  const [values, setValues] = useState<string | undefined>(
+    findDeliveryModesLabel(filter.updateFreq)
+  );
+
+  const handleChange = useCallback(
+    (_: any, newAlignment: string) => {
+      // If user already selected it, click on it again should
+      // unselect
+      setValues((v) => (v === newAlignment ? undefined : newAlignment));
+
+      setFilter((filter) => {
+        // For exclusive toggle, it must be string
+        switch (newAlignment) {
+          case "Real-time":
+          case "Delayed":
+          case "Other":
+            filter.updateFreq = DELIVERY_MODES.get(newAlignment);
+            break;
+          default:
+            filter.updateFreq = undefined;
+        }
+        return { ...filter };
+      });
+    },
+    [setFilter]
+  );
+
+  useEffect(() => {
+    findDeliveryModesLabel(filter.updateFreq);
+  }, [filter.updateFreq]);
 
   return (
     <Grid container sx={{ ...sx }}>
@@ -31,7 +75,7 @@ const DataDeliveryModeFilter: FC<DataDeliveryModeFilterProps> = ({
           exclusive
           onChange={handleChange}
         >
-          {DELIVERY_MODES.map((mode, index) => (
+          {Array.from(DELIVERY_MODES.keys()).map((mode, index) => (
             <StyledToggleButton value={mode} key={index}>
               {mode}
             </StyledToggleButton>
diff --git a/src/components/common/filters/ImosOnlySwitch.tsx b/src/components/common/filters/ImosOnlySwitch.tsx
index 7b3766c1..ab236eca 100644
--- a/src/components/common/filters/ImosOnlySwitch.tsx
+++ b/src/components/common/filters/ImosOnlySwitch.tsx
@@ -52,7 +52,6 @@ const ImosOnlySwitch: FC<imosOnlySwitchProps> = ({ filter, setFilter }) => {
         justifyContent="center"
       >
         <Switch
-          defaultChecked={isImosOnlyDataset ?? false}
           checked={isImosOnlyDataset ?? false}
           onClick={onImosOnlySwitch}
         />
diff --git a/src/components/common/store/componentParamReducer.tsx b/src/components/common/store/componentParamReducer.tsx
index 79d81a0d..f831793a 100644
--- a/src/components/common/store/componentParamReducer.tsx
+++ b/src/components/common/store/componentParamReducer.tsx
@@ -4,6 +4,7 @@
  */
 import { bboxPolygon } from "@turf/turf";
 import { Feature, Polygon, GeoJsonProperties } from "geojson";
+import { DatasetFrequency } from "./searchReducer";
 
 const UPDATE_PARAMETER_STATES = "UPDATE_PARAMETER_STATES";
 const UPDATE_DATETIME_FILTER_VARIABLE = "UPDATE_DATETIME_FILTER_VARIABLE";
@@ -13,6 +14,7 @@ const UPDATE_IMOS_ONLY_DATASET_FILTER_VARIABLE =
   "UPDATE_IMOS_ONLY_DATASET_FILTER_VARIABLE";
 const UPDATE_POLYGON_FILTER_VARIABLE = "UPDATE_POLYGON_FILTER_VARIABLE";
 const UPDATE_CATEGORY_FILTER_VARIABLE = "UPDATE_CATEGORY_FILTER_VARIABLE";
+const UPDATE_UPDATE_FREQ_VARIABLE = "UPDATE_UPDATE_FREQ_VARIABLE";
 const UPDATE_SORT_BY_VARIABLE = "UPDATE_SORT_BY_VARIABLE";
 
 interface DataTimeFilterRange {
@@ -28,6 +30,7 @@ export interface ParameterState {
   searchText?: string;
   commonKey?: string;
   categories?: Array<Category>;
+  updateFreq?: DatasetFrequency | undefined;
   sortby?: string;
 }
 // Function use to test an input value is of type Category
@@ -105,6 +108,15 @@ const updateCategories = (input: Array<Category>): ActionType => {
   };
 };
 
+const updateUpdateFreq = (input: DatasetFrequency | undefined): ActionType => {
+  return {
+    type: UPDATE_UPDATE_FREQ_VARIABLE,
+    payload: {
+      updateFreq: input,
+    } as ParameterState,
+  };
+};
+
 const updateSortBy = (
   input: Array<{ field: string; order: "ASC" | "DESC" }>
 ): ActionType => {
@@ -198,6 +210,11 @@ const paramReducer = (
         ...state,
         categories: action.payload.categories,
       };
+    case UPDATE_UPDATE_FREQ_VARIABLE:
+      return {
+        ...state,
+        updateFreq: action.payload.updateFreq,
+      };
     case UPDATE_SORT_BY_VARIABLE:
       return {
         ...state,
@@ -341,4 +358,5 @@ export {
   updateParameterStates,
   updateSortBy,
   updateCommonKey,
+  updateUpdateFreq,
 };
diff --git a/src/components/common/store/searchReducer.tsx b/src/components/common/store/searchReducer.tsx
index 5367dad7..97fb2369 100644
--- a/src/components/common/store/searchReducer.tsx
+++ b/src/components/common/store/searchReducer.tsx
@@ -10,6 +10,7 @@ import {
   PolygonOperation,
   TemporalAfterOrBefore,
   TemporalDuring,
+  UpdateFrequency,
 } from "../cqlFilters";
 import { OGCCollection, OGCCollections } from "./OGCCollectionDefinitions";
 import {
@@ -18,6 +19,12 @@ import {
 } from "../../../utils/ErrorBoundary";
 import { mergeWithDefaults } from "../utils";
 
+export enum DatasetFrequency {
+  REALTIME = "real-time",
+  DELAYED = "delayed",
+  OTHER = "other",
+}
+
 export type SuggesterParameters = {
   input?: string;
   filter?: string;
@@ -321,6 +328,11 @@ const createSearchParamFrom = (
     );
   }
 
+  if (i.updateFreq) {
+    const f = cqlDefaultFilters.get("UPDATE_FREQUENCY") as UpdateFrequency;
+    p.filter = appendFilter(p.filter, f(i.updateFreq));
+  }
+
   if (
     i.dateTimeFilterRange &&
     (i.dateTimeFilterRange.start || i.dateTimeFilterRange.end)
@@ -376,17 +388,9 @@ const createSearchParamFrom = (
   return p;
 };
 
-const createSearchParamForImosRealTime = () => {
-  const p: SearchParameters = {};
-  p.filter = cqlDefaultFilters.get("REAL_TIME_ONLY") as string;
-
-  return p;
-};
-
 export {
   createSuggesterParamFrom,
   createSearchParamFrom,
-  createSearchParamForImosRealTime,
   fetchSuggesterOptions,
   fetchResultWithStore,
   fetchResultNoStore,
diff --git a/src/pages/LandingPage.tsx b/src/pages/LandingPage.tsx
new file mode 100644
index 00000000..e69de29b