diff --git a/src/postgres_history.py b/src/postgres_history.py
index 2b19fb9..70d96c8 100644
--- a/src/postgres_history.py
+++ b/src/postgres_history.py
@@ -21,8 +21,8 @@ class PostgresHistory:
         end: datetime.datetime,
         limit: int = 2000,
     ) -> List[Dict]:
-        if not 1 <= limit <= 5000:
-            raise ValueError("limit must be between 1 and 5000")
+        if not 1 <= limit <= 10000:
+            raise ValueError("limit must be between 1 and 10000")
         if start >= end:
             raise ValueError("start must be before end")
 
diff --git a/src/static/dashboard.html b/src/static/dashboard.html
index 91cab95..b793f29 100644
--- a/src/static/dashboard.html
+++ b/src/static/dashboard.html
@@ -195,7 +195,7 @@
     <section class="map-card" id="history-card" style="margin-top:14px;padding:20px">
         <div style="display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap">
             <div><h2 id="history-title" style="margin:0;font-size:1rem">PostgreSQL history</h2><p id="history-status" class="subtitle">Select a RID flow station to load the last 7 days</p></div>
-            <select id="history-range" style="padding:9px 12px;border:1px solid var(--border);border-radius:10px;background:white"><option value="24">24 hours</option><option value="168" selected>7 days</option><option value="720">30 days</option><option value="2160">90 days</option></select>
+            <select id="history-range" style="padding:9px 12px;border:1px solid var(--border);border-radius:10px;background:white"><option value="24">24 hours</option><option value="168" selected>7 days</option><option value="720">30 days</option><option value="2160">90 days</option><option value="876000">All time</option></select>
         </div>
         <div style="height:260px;margin-top:14px"><canvas id="history-chart" aria-label="Historical water level and discharge chart"></canvas></div>
     </section>