diff --git a/dp-terraform/helm/rhacs-terraform/charts/observability/templates/01-operator-03-secret-alertmanager.yaml b/dp-terraform/helm/rhacs-terraform/charts/observability/templates/01-operator-03-secret-alertmanager.yaml
index e6f743feab..f66edfa7d8 100644
--- a/dp-terraform/helm/rhacs-terraform/charts/observability/templates/01-operator-03-secret-alertmanager.yaml
+++ b/dp-terraform/helm/rhacs-terraform/charts/observability/templates/01-operator-03-secret-alertmanager.yaml
@@ -8,23 +8,34 @@ stringData:
     global:
       resolve_timeout: 5m
     route:
-      receiver: default-receiver
+      receiver: managed-rhacs-pagerduty
       repeat_interval: 12h
       routes:
-      - receiver: managed-rhacs-pagerduty
-        match:
-          observability: managed-rhacs
-          severity: critical
       - receiver: managed-rhacs-deadmanssnitch
         repeat_interval: 5m
         match:
           alertname: DeadMansSwitch
           observability: managed-rhacs
     receivers:
-    - name: default-receiver
     - name: managed-rhacs-pagerduty
       pagerduty_configs:
-      - service_key: {{ .Values.pagerduty.key | quote }}
+      - routing_key: {{ .Values.pagerduty.key | quote }}
+        {{- /*
+          We want the severity to be based on the severity label coming from the
+          alert itself. If there is no severity label common to the group of
+          alerts, then default to info. That looks like:
+              `or .GroupLabels.severity "info"`
+          in Go templating. To properly escape for Helm templating, the Helm
+          templating engine needs to output the literal string `{{`, since
+          Alertmanager templating syntax is the same as Helm. To do that,
+          the expression `{{` is used inside the double bracket syntax for
+          evaluating Go template expressions. Thus: `{{ "{{" }}`.
+
+          The inner double quotes work because Helm evaluates the expression
+          that includes the inner double quotes before the document is parsed
+          as yaml.
+        */}}
+        severity: "{{ "{{" }} or .GroupLabels.severity \"info\" }}"
     - name: managed-rhacs-deadmanssnitch
       webhook_configs:
       - url: {{ .Values.deadMansSwitch.url | quote }}
diff --git a/dp-terraform/helm/rhacs-terraform/terraform_cluster.sh b/dp-terraform/helm/rhacs-terraform/terraform_cluster.sh
index fe6595ce7d..2b99b1dc1e 100755
--- a/dp-terraform/helm/rhacs-terraform/terraform_cluster.sh
+++ b/dp-terraform/helm/rhacs-terraform/terraform_cluster.sh
@@ -156,7 +156,7 @@ invoke_helm "${SCRIPT_DIR}" rhacs-terraform \
   --set observability.observatorium.gateway="${OBSERVABILITY_OBSERVATORIUM_GATEWAY}" \
   --set observability.observatorium.metricsClientId="${OBSERVABILITY_OBSERVATORIUM_METRICS_CLIENT_ID}" \
   --set observability.observatorium.metricsSecret="${OBSERVABILITY_OBSERVATORIUM_METRICS_SECRET}" \
-  --set observability.pagerduty.key="${OBSERVABILITY_PAGERDUTY_SERVICE_KEY}" \
+  --set observability.pagerduty.key="${OBSERVABILITY_PAGERDUTY_ROUTING_KEY}" \
   --set observability.deadMansSwitch.url="${OBSERVABILITY_DEAD_MANS_SWITCH_URL}"
 
 # To uninstall an existing release: