diff --git a/frontend/components/dashboard/DetailPanel.tsx b/frontend/components/dashboard/DetailPanel.tsx
index 25a2269a..22abbf0b 100644
--- a/frontend/components/dashboard/DetailPanel.tsx
+++ b/frontend/components/dashboard/DetailPanel.tsx
@@ -17,6 +17,7 @@ import {
   getRiskBadgeLabel,
   getTemperatureChartData,
 } from "@/lib/dashboard-utils";
+import { normalizeObservationSourceLabel } from "@/lib/source-labels";
 
 function DetailMiniTemperatureChart({ detail }: { detail: CityDetail }) {
   const { locale, t } = useI18n();
@@ -178,17 +179,20 @@ export function DetailPanel() {
     () => getTodayPolymarketUrl(detail, locale),
     [detail, locale],
   );
-  const basicSettlementLabel =
+  const basicSettlementLabel = normalizeObservationSourceLabel(
     selectedSummary?.current?.settlement_source_label ||
-    selectedCityItem?.settlement_source_label ||
-    selectedCityItem?.settlement_source ||
-    (locale === "en-US" ? "Settlement source pending" : "结算口径待确认");
+      selectedCityItem?.settlement_source_label ||
+      selectedCityItem?.settlement_source,
+    locale === "en-US" ? "Settlement source pending" : "结算口径待确认",
+  );
   const basicAirportLabel =
     selectedCityItem?.airport ||
     selectedSummary?.icao ||
     (locale === "en-US" ? "Airport pending" : "机场待确认");
-  const heroSettlementLabel =
-    detail?.current?.settlement_source_label || basicSettlementLabel;
+  const heroSettlementLabel = normalizeObservationSourceLabel(
+    detail?.current?.settlement_source_label,
+    basicSettlementLabel,
+  );
   const heroAirportLabel = detail?.risk?.airport || basicAirportLabel;
   const isSparsePanelDetail = Boolean(
     detail &&
diff --git a/frontend/components/dashboard/FutureForecastModal.tsx b/frontend/components/dashboard/FutureForecastModal.tsx
index d453825f..3e6baf91 100644
--- a/frontend/components/dashboard/FutureForecastModal.tsx
+++ b/frontend/components/dashboard/FutureForecastModal.tsx
@@ -32,6 +32,10 @@ import {
   getWeatherSummary,
 } from "@/lib/dashboard-utils";
 import { dashboardClient } from "@/lib/dashboard-client";
+import {
+  normalizeObservationSourceCode,
+  normalizeObservationSourceLabel,
+} from "@/lib/source-labels";
 import type { IntradayMeteorologySignal, MarketScan } from "@/lib/dashboard-types";
 
 function normalizeMarketValue(value?: number | null) {
@@ -1331,9 +1335,9 @@ export function FutureForecastModal() {
     String(intradayMeteorology.peak_window || "").trim() ||
     paceView?.peakWindowText ||
     "--";
-  const settlementSourceCode = String(
+  const settlementSourceCode = normalizeObservationSourceCode(
     detail.current?.settlement_source || "",
-  ).trim().toLowerCase();
+  );
   const settlementStationCode = String(
     detail.current?.station_code || detail.risk?.icao || "",
   )
@@ -1345,19 +1349,20 @@ export function FutureForecastModal() {
     (locale === "en-US" ? "Anchor station" : "锚点站");
   const airportMetarAnchor =
     settlementSourceCode === "metar" ||
-    settlementSourceCode === "wunderground" ||
     Boolean(settlementStationCode && /^[A-Z]{4}$/.test(settlementStationCode));
   const anchorSourceLabel = airportMetarAnchor
     ? settlementStationCode
       ? `${settlementStationCode} METAR`
       : "METAR"
-    : detail.current?.settlement_source_label ||
-      detail.current?.settlement_source ||
-      (locale === "en-US" ? "Official observation" : "官方观测");
+    : normalizeObservationSourceLabel(
+        detail.current?.settlement_source_label ||
+          detail.current?.settlement_source,
+        locale === "en-US" ? "Official observation" : "官方观测",
+      );
   const anchorRuleText = airportMetarAnchor
     ? locale === "en-US"
-      ? `Airport contract anchor: use the ${anchorSourceLabel} reports. Wunderground is only a history display page when present.`
-      : `机场合约锚点：以 ${anchorSourceLabel} 报文为准；若出现 Wunderground，它只是历史展示页面。`
+      ? `Airport contract anchor: use the ${anchorSourceLabel} reports. Third-party history pages are display-only when present.`
+      : `机场合约锚点：以 ${anchorSourceLabel} 报文为准；第三方历史页只作为展示入口。`
     : locale === "en-US"
       ? `Official anchor: use ${anchorSourceLabel} observations for this contract.`
       : `官方锚点：该合约按 ${anchorSourceLabel} 观测口径判断。`;
diff --git a/frontend/components/dashboard/PanelSections.tsx b/frontend/components/dashboard/PanelSections.tsx
index 371ac306..fc588759 100644
--- a/frontend/components/dashboard/PanelSections.tsx
+++ b/frontend/components/dashboard/PanelSections.tsx
@@ -20,6 +20,10 @@ import {
   getTemperatureChartData,
   getWeatherSummary,
 } from "@/lib/dashboard-utils";
+import {
+  normalizeObservationSourceCode,
+  normalizeObservationSourceLabel,
+} from "@/lib/source-labels";
 
 function EmptyState({ text }: { text: string }) {
   return (
@@ -548,22 +552,21 @@ export function HeroSummary() {
   const { weatherIcon, weatherText } = getWeatherSummary(data, locale);
   const metaItems = getHeroMetaItems(data, locale);
   const current = data.current || {};
-  const settlementSourceCode = String(current.settlement_source || "metar")
-    .trim()
-    .toLowerCase();
+  const settlementSourceCode = normalizeObservationSourceCode(
+    current.settlement_source || "metar",
+  );
   const settlementIcao = String(
     current.station_code || data.risk?.icao || "",
   )
     .trim()
     .toUpperCase();
   const settlementSource =
-    settlementSourceCode === "wunderground"
-      ? settlementIcao
-        ? `${settlementIcao} METAR`
-        : "METAR"
-      : String(current.settlement_source_label || current.settlement_source || "METAR")
-          .trim()
-          .toUpperCase();
+    settlementSourceCode === "metar" && settlementIcao
+      ? `${settlementIcao} METAR`
+      : normalizeObservationSourceLabel(
+          current.settlement_source_label || current.settlement_source,
+          "METAR",
+        ).toUpperCase();
   const isMax =
     current.max_so_far != null &&
     current.temp != null &&
diff --git a/frontend/components/dashboard/PolyWeatherDashboard.tsx b/frontend/components/dashboard/PolyWeatherDashboard.tsx
index c8b2c77b..6f111272 100644
--- a/frontend/components/dashboard/PolyWeatherDashboard.tsx
+++ b/frontend/components/dashboard/PolyWeatherDashboard.tsx
@@ -20,6 +20,7 @@ import type {
   CitySummary,
   RiskLevel,
 } from "@/lib/dashboard-types";
+import { normalizeObservationSourceLabel } from "@/lib/source-labels";
 
 const loadHistoryModal = () =>
   import("@/components/dashboard/HistoryModal").then(
@@ -214,10 +215,12 @@ function HomeIntelligencePanel({ snapshots }: { snapshots: CitySnapshot[] }) {
     detail?.risk?.level;
   const deviation = summary?.deviation_monitor || detail?.deviation_monitor;
   const observationSource =
-    summary?.current?.settlement_source_label ||
-    detail?.current?.settlement_source_label ||
-    city.settlement_source_label ||
-    city.airport;
+    normalizeObservationSourceLabel(
+      summary?.current?.settlement_source_label ||
+        detail?.current?.settlement_source_label ||
+        city.settlement_source_label,
+      "METAR",
+    );
   const probabilityBuckets =
     detail?.probabilities?.distribution ||
     (detail?.local_date
diff --git a/frontend/lib/dashboard-official-sources.ts b/frontend/lib/dashboard-official-sources.ts
index af73d989..88b4c935 100644
--- a/frontend/lib/dashboard-official-sources.ts
+++ b/frontend/lib/dashboard-official-sources.ts
@@ -1,4 +1,5 @@
 import type { CityDetail } from "@/lib/dashboard-types";
+import { normalizeObservationSourceLabel } from "@/lib/source-labels";
 
 export type OfficialSourceLink = {
   label: string;
@@ -749,7 +750,10 @@ export function getOfficialSourceLinks(detail: CityDetail): OfficialSourceLink[]
         }),
       };
     }
-    return link;
+    return {
+      ...link,
+      label: normalizeObservationSourceLabel(link.label, link.label),
+    };
   });
   const seen = new Set<string>();
   return links.filter((link) => {
diff --git a/frontend/lib/dashboard-utils.ts b/frontend/lib/dashboard-utils.ts
index f47b4010..8848b95e 100644
--- a/frontend/lib/dashboard-utils.ts
+++ b/frontend/lib/dashboard-utils.ts
@@ -5,6 +5,7 @@ import {
   HistoryPoint,
   NearbyStation,
 } from "@/lib/dashboard-types";
+import { normalizeObservationSourceLabel } from "@/lib/source-labels";
 
 const METAR_WX_MAP: Record<
   string,
@@ -98,7 +99,10 @@ function getObservationSourceCode(detail: CityDetail): string {
 }
 
 function getObservationSourceTag(detail: CityDetail): string {
-  const label = String(detail.current?.settlement_source_label || "")
+  const label = normalizeObservationSourceLabel(
+    detail.current?.settlement_source_label,
+    "",
+  )
     .trim()
     .toUpperCase();
   if (label) return label;
diff --git a/frontend/lib/i18n.ts b/frontend/lib/i18n.ts
index fc0cf413..3e39b581 100644
--- a/frontend/lib/i18n.ts
+++ b/frontend/lib/i18n.ts
@@ -63,9 +63,9 @@ const MESSAGES: Record<Locale, Record<string, string>> = {
     "history.loading": "正在获取历史数据...",
     "history.error": "获取历史信息失败",
     "history.empty": "近 15 天暂无该城市历史数据",
-    "history.hitRate": "DEB 结算胜率 (WU)",
+    "history.hitRate": "DEB 结算胜率 (METAR)",
     "history.mae": "DEB MAE",
-    "history.debHitRate": "DEB 结算胜率 (WU)",
+    "history.debHitRate": "DEB 结算胜率 (METAR)",
     "history.debMae": "DEB MAE",
     "history.muMae": "μ MAE",
     "history.bestModelMae": "最佳单模型 MAE",
@@ -230,9 +230,9 @@ const MESSAGES: Record<Locale, Record<string, string>> = {
     "history.loading": "Loading historical data...",
     "history.error": "Failed to load historical data",
     "history.empty": "No historical records for this city in the last 15 days",
-    "history.hitRate": "DEB Settlement Hit Rate (WU)",
+    "history.hitRate": "DEB Settlement Hit Rate (METAR)",
     "history.mae": "DEB MAE",
-    "history.debHitRate": "DEB Settlement Hit Rate (WU)",
+    "history.debHitRate": "DEB Settlement Hit Rate (METAR)",
     "history.debMae": "DEB MAE",
     "history.muMae": "μ MAE",
     "history.bestModelMae": "Best Single-model MAE",
diff --git a/frontend/lib/source-labels.ts b/frontend/lib/source-labels.ts
new file mode 100644
index 00000000..8e39f767
--- /dev/null
+++ b/frontend/lib/source-labels.ts
@@ -0,0 +1,24 @@
+export function normalizeObservationSourceLabel(
+  value?: string | null,
+  fallback = "METAR",
+) {
+  const raw = String(value || "").trim();
+  if (!raw) return fallback;
+  const lowered = raw.toLowerCase();
+  if (
+    lowered === "wu" ||
+    lowered === "wunderground"
+  ) {
+    return "METAR";
+  }
+  if (lowered.includes("wunderground")) {
+    return raw.replace(/wunderground/gi, "METAR");
+  }
+  return raw;
+}
+
+export function normalizeObservationSourceCode(value?: string | null) {
+  const code = String(value || "").trim().toLowerCase();
+  if (code === "wu" || code === "wunderground") return "metar";
+  return code;
+}