diff --git a/src/pyaro_readers/actrisebas/ActrisEbasReader.py b/src/pyaro_readers/actrisebas/ActrisEbasReader.py
index e2b75fe..00d5e8c 100644
--- a/src/pyaro_readers/actrisebas/ActrisEbasReader.py
+++ b/src/pyaro_readers/actrisebas/ActrisEbasReader.py
@@ -286,7 +286,12 @@ def _read(
                 for s_idx, site_name in enumerate(urls_to_dl):
                     for f_idx, url in enumerate(urls_to_dl[site_name]):
                         logger.info(f"reading file {url}")
-                        tmp_data = xr.open_dataset(url)
+                        try:
+                            tmp_data = xr.open_dataset(url)
+                        except Exception as e:
+                            logger.error(f"failed to read {url} with error {e}")
+                            assert url
+                            continue
                         # check for time filter by looking into
                         # np.datetime64(tmp_data.attrs["time_coverage_start"].split()[0])
                         # and
diff --git a/src/pyaro_readers/actrisebas/definitions.toml b/src/pyaro_readers/actrisebas/definitions.toml
index b0e3b3d..7f39d99 100644
--- a/src/pyaro_readers/actrisebas/definitions.toml
+++ b/src/pyaro_readers/actrisebas/definitions.toml
@@ -74,6 +74,13 @@ ebas_component = ["sulphur_dioxide"]
 ebas_matrix = ["air",]
 standard_names = ["mass_concentration_of_sulphur_dioxide_expressed_as_sulphur_in_air", ]
 
+[variables.concSso2]
+actris_variable = ["sulfur dioxide mass concentration"]
+actris_matrix = ["gas phase"]
+ebas_component = ["sulphur_dioxide"]
+ebas_matrix = ["air",]
+standard_names = ["mass_concentration_of_sulphur_dioxide_expressed_as_sulphur_in_air", ]
+
 [variables.vmrso2]
 actris_variable = ["sulfur dioxide mass concentration"]
 actris_matrix = ["gas phase"]
@@ -89,6 +96,22 @@ ebas_component = ["pm10_mass"]
 ebas_matrix = ["pm10",]
 standard_names = ["mass_concentration_of_pm10_ambient_aerosol_particles_in_air", ]
 
+[variables.concpm1]
+actris_variable = ["aerosol particle mass concentration"]
+#actris_variable = ["aerosol particle number concentration"]
+actris_matrix = ["particle phase"]
+ebas_component = ["pm1_mass"]
+ebas_matrix = ["pm1",]
+standard_names = ["mass_concentration_of_pm1_ambient_aerosol_particles_in_air", ]
+
+[variables.concpm25]
+actris_variable = ["aerosol particle mass concentration"]
+#actris_variable = ["aerosol particle number concentration"]
+actris_matrix = ["particle phase"]
+ebas_component = ["pm25_mass"]
+ebas_matrix = ["pm25",]
+standard_names = ["mass_concentration_of_pm2p5_ambient_aerosol_particles_in_air", ]
+
 #[variables.]
 #actris_variable = [""]
 #actris_matrix = [""]
diff --git a/tests/test_ActrisEbasReader.py b/tests/test_ActrisEbasReader.py
index bdcd51f..c6e340d 100644
--- a/tests/test_ActrisEbasReader.py
+++ b/tests/test_ActrisEbasReader.py
@@ -1,5 +1,6 @@
 import unittest
 import urllib.request
+import logging
 
 import pyaro
 import pyaro.timeseries
@@ -8,6 +9,8 @@
 TEST_URL = "https://prod-actris-md.nilu.no/Version"
 VOCABULARY_URL = "https://prod-actris-md.nilu.no/V"
 
+logger = logging.getLogger(__name__)
+
 
 class TestActrisEbasTimeSeriesReader(unittest.TestCase):
     engine = "actrisebas"
@@ -21,7 +24,9 @@ class TestActrisEbasTimeSeriesReader(unittest.TestCase):
     # pyaerocom_vars_to_read = ["vmrso2"]
 
     # pyaerocom_vars_to_read = ["concso4t"]
-    pyaerocom_vars_to_read = ["concpm10"]
+    # pyaerocom_vars_to_read = ["concpm10"]
+    # pyaerocom_vars_to_read = ["concpm25"]
+    pyaerocom_vars_to_read = ["concpm1"]
 
     station_filter = pyaro.timeseries.Filter.StationFilter(
         ["Birkenes II", "Jungfraujoch", "Ispra", "Melpitz", "Westerland"], []
@@ -38,7 +43,8 @@ class TestActrisEbasTimeSeriesReader(unittest.TestCase):
     #"start_include": [("2019-01-01 00:00:00", "2023-12-24 00:00:00")]
 
     # filters on "start_include"
-    time_filter = pyaro.timeseries.Filter.TimeBoundsFilter([("2019-01-01 00:00:00", "2019-12-31 23:59:59")])
+    # time_filter = pyaro.timeseries.Filter.TimeBoundsFilter([("2019-01-01 00:00:00", "2019-12-31 23:59:59")])
+    time_filter = pyaro.timeseries.Filter.TimeBoundsFilter([("2014-01-01 00:00:00", "2019-12-31 23:59:59")])
 
     def test_api_online(self, url=TEST_URL):
         try:
@@ -71,7 +77,7 @@ def test_api_reading_small_data_set(self):
             filters=filters,
         ) as ts:
             self.assertGreaterEqual(len(ts.variables()), 1)
-            self.assertGreaterEqual(len(ts.stations()), 2)
+            self.assertGreaterEqual(len(ts.stations()), 1)
             self.assertGreaterEqual(len(ts._data[ts.variables()[0]]), 100)
             self.assertGreaterEqual(len(ts.data(ts.variables()[0])), 100)
             self.assertGreaterEqual(len(ts.variables()), 1)
@@ -90,7 +96,7 @@ def test_api_reading_pyaerocom_naming(self):
             engine = pyaro.list_timeseries_engines()[self.engine]
             with engine.open(TEST_URL, filters=filters) as ts:
                 self.assertGreaterEqual(len(ts.variables()), 1)
-                self.assertGreaterEqual(len(ts.stations()), 2)
+                self.assertGreaterEqual(len(ts.stations()), 1)
                 self.assertGreaterEqual(len(ts._data[ts.variables()[0]]), 1000)
                 self.assertGreaterEqual(len(ts.data(ts.variables()[0])), 1000)
                 self.assertIn("revision", ts.metadata())