diff --git a/parameters.yaml b/parameters.yaml
index 0fdf7c6..5208559 100644
--- a/parameters.yaml
+++ b/parameters.yaml
@@ -3,7 +3,7 @@ datapath: "/data/SDS/"                    # SC3 Datapath
 networks: ["1Y", "HA"]                    # select networks, list or str
 stations: "*"                             # select stations, list or str
 locations: "*"                            # select locations, list or str
-channels: ["EX1", "EX2", "EX3", "VEI"]    # Specify SOH channels, currently supported EX[1-3] and VEI
+channels: ["EX1", "EX2", "EX3", "VEI", "LCQ"]    # Specify SOH channels, currently supported EX[1-3], VEI, LCQ
 stations_blacklist: ["TEST", "EREA"]      # exclude these stations
 networks_blacklist: []                    # exclude these networks
 interval: 60               # Perform checks every x seconds
@@ -43,6 +43,8 @@ THRESHOLDS:
   low_volt: 12                 # min voltage for low voltage warning
   high_volt: 14.8               # max voltage for over voltage warning
   unclassified: 5              # min voltage samples not classified for warning
+  clockquality_warn: 90        # clock quality ranges from 0 % to 100 % with 100 % being the best level
+  clockquality_fail: 70
 
 # ---------------------------------------- OPTIONAL PARAMETERS ---------------------------------------------------------
 
@@ -62,7 +64,7 @@ EMAIL:
   networks_blacklist: []                           # do not send emails for specific network
 
 # names for plotting of the above defined parameter "channels" in the same order
-channel_names: ["Temperature (°C)", "230V/12V Status (V)", "Router/Charger State (V)", "Logger Voltage (V)"]
+channel_names: ["Clock Quality (%)", "Temperature (°C)", "230V/12V Status (V)", "Router/Charger State (V)", "Logger Voltage (V)"] # names for plotting (optional)
 # specify y-ticks (and ylims) giving, (ymin, ymax, step) for each of the above channels (0: default)
 CHANNEL_TICKS:
   - [-10, 50, 10]
diff --git a/survBot.py b/survBot.py
index 10dfabf..0de3f7f 100755
--- a/survBot.py
+++ b/survBot.py
@@ -61,7 +61,7 @@ def fancy_timestr(dt, thresh=600, modif='+'):
 
 class SurveillanceBot(object):
     def __init__(self, parameter_path, outpath_html=None):
-        self.keys = ['last active', '230V', '12V', 'router', 'charger', 'voltage', 'temp', 'other']
+        self.keys = ['last active', '230V', '12V', 'router', 'charger', 'voltage', 'clock', 'temp', 'other']
         self.parameter_path = parameter_path
         self.update_parameters()
         self.starttime = UTCDateTime()
@@ -685,6 +685,7 @@ class StationQC(object):
         self.pb_temp_analysis()
         self.pb_power_analysis()
         self.pb_rout_charge_analysis()
+        self.clock_quality_analysis()
 
     def return_print_analysis(self):
         items = [self.nwst_id]
@@ -713,6 +714,47 @@ class StationQC(object):
     def get_last_occurrence(self, trace, indices):
         return self.get_time(trace, indices[-1])
 
+    def clock_quality_analysis(self, channel='LCQ'):
+        """ Analyse clock quality """
+        key = 'clock'
+        st = self.stream.select(channel=channel)
+        trace = self.get_trace(st, key)
+        if not trace: return
+        clockQuality = trace.data
+        clockQuality_warn_level = self.parameters.get('THRESHOLDS').get('clockquality_warn')
+        clockQuality_fail_level = self.parameters.get('THRESHOLDS').get('clockquality_fail')
+
+        if self.verbosity > 1:
+            self.print(40 * '-')
+            self.print('Performing Clock Quality check', flush=False)
+        
+        clockQuality_warn = np.where(clockQuality < clockQuality_warn_level)[0]
+        clockQuality_fail = np.where(clockQuality < clockQuality_fail_level)[0]
+
+        if len(clockQuality_warn) == 0 and len(clockQuality_fail) == 0:
+            self.status_ok(key, detailed_message=f'ClockQuality={(clockQuality[-1])}')
+            return
+ 
+        n_qc_warn = 0
+        n_qc_fail = 0
+
+        warn_message = f'Trace {trace.get_id()}:'
+        if len(clockQuality_warn) > 0:
+            # try calculate number of warn peaks from gaps between indices
+            n_qc_warn = len(np.where(np.diff(clockQuality_warn) > 1)[0]) + 1
+            detailed_message = warn_message + f' {n_qc_warn}x Qlock Quality less then {clockQuality_warn_level}' \
+                               + self.get_last_occurrence_timestring(trace, clockQuality_warn)
+            self.warn(key, detailed_message=detailed_message, count=n_qc_warn,
+                      last_occurrence=self.get_last_occurrence(trace, clockQuality_warn))
+
+        if len(clockQuality_fail) > 0:
+            # try calculate number of fail peaks from gaps between indices
+            n_qc_fail = len(np.where(np.diff(clockQuality_fail) > 1)[0]) + 1
+            detailed_message = warn_message + f' {n_qc_fail}x Qlock Quality less then {clockQuality_fail_level}V ' \
+                               + self.get_last_occurrence_timestring(trace, clockQuality_fail)
+            self.error(key, detailed_message=detailed_message, count=n_qc_fail,
+                      last_occurrence=self.get_last_occurrence(trace, clockQuality_fail))
+
     def voltage_analysis(self, channel='VEI'):
         """ Analyse voltage channel for over/undervoltage """
         key = 'voltage'