diff --git a/packages/website/src/common/Chart/MultipleSensorsCharts/__snapshots__/index.test.tsx.snap b/packages/website/src/common/Chart/MultipleSensorsCharts/__snapshots__/index.test.tsx.snap
index 038c775d0..da738e124 100644
--- a/packages/website/src/common/Chart/MultipleSensorsCharts/__snapshots__/index.test.tsx.snap
+++ b/packages/website/src/common/Chart/MultipleSensorsCharts/__snapshots__/index.test.tsx.snap
@@ -794,7 +794,7 @@ exports[`MultipleSensorsCharts should render with given state from Redux store 1
                       >
                         36.1
                          
-                        psu
+                        ppt
                       </mock-typography>
                     </div>
                     <div
@@ -807,7 +807,7 @@ exports[`MultipleSensorsCharts should render with given state from Redux store 1
                       >
                         34.9
                          
-                        psu
+                        ppt
                       </mock-typography>
                     </div>
                     <div
@@ -820,7 +820,7 @@ exports[`MultipleSensorsCharts should render with given state from Redux store 1
                       >
                         33.8
                          
-                        psu
+                        ppt
                       </mock-typography>
                     </div>
                   </div>
diff --git a/packages/website/src/common/SiteDetails/WaterSampling/utils.ts b/packages/website/src/common/SiteDetails/WaterSampling/utils.ts
index 185e39d33..7b7684cf5 100644
--- a/packages/website/src/common/SiteDetails/WaterSampling/utils.ts
+++ b/packages/website/src/common/SiteDetails/WaterSampling/utils.ts
@@ -123,7 +123,7 @@ export function metricFields(
         {
           label: 'Salinity',
           value: `${formatNumber(data?.salinity, 1)}`,
-          unit: 'psu',
+          unit: source === 'hui' ? 'ppt' : 'psu',
           xs: 6,
         },
       ];
diff --git a/packages/website/src/constants/chartConfigs/huiConfig.ts b/packages/website/src/constants/chartConfigs/huiConfig.ts
index 53c2c0488..63db08777 100644
--- a/packages/website/src/constants/chartConfigs/huiConfig.ts
+++ b/packages/website/src/constants/chartConfigs/huiConfig.ts
@@ -9,7 +9,7 @@ export type SondeMetricsKeys = Extract<
 export const huiConfig: Record<SondeMetricsKeys, BaseSourceConfig> = {
   salinity: {
     title: 'Salinity',
-    units: 'psu',
+    units: 'ppt',
     description: '',
     visibility: 'public',
     order: 1,