diff --git a/pyaerocom/data/variables.ini b/pyaerocom/data/variables.ini
index 86300f132..18455b9d2 100644
--- a/pyaerocom/data/variables.ini
+++ b/pyaerocom/data/variables.ini
@@ -2649,6 +2649,11 @@ unit = ug m-3
 description=Mass concentration of organic carbon
 unit = ug m-3
 
+# ETEX1
+
+[concch]
+description=Mass concentration of CH above ambient level
+unit = ng m-3
 
 # EMEP vars added for testing
 
diff --git a/pyaerocom/io/read_etex1.py b/pyaerocom/io/read_etex1.py
new file mode 100644
index 000000000..c3c26871a
--- /dev/null
+++ b/pyaerocom/io/read_etex1.py
@@ -0,0 +1,139 @@
+from __future__ import annotations
+
+from datetime import datetime, timedelta, timezone
+from pathlib import Path
+from types import SimpleNamespace
+from typing import Generator
+
+import pandas as pd
+from numpy import sign
+
+from pyaerocom.ungriddeddata import UngriddedData
+from pyaerocom.io.readungriddedbase import ReadUngriddedBase
+
+
+ETEX1 = SimpleNamespace(
+    variable_name="concch",
+    long_name="PMCH concentration above ambient level",
+    units="ng/m3",
+    version="etex1_v1.1.960505",
+    stations=Path("/lustre/storeB/users/magnusu/ETEX-1/stationlist.950130"),
+    concentrations=Path("/lustre/storeB/users/magnusu/ETEX-1/pmch.dat"),
+    quality=Path("/lustre/storeB/users/magnusu/ETEX-1/pmch.cod"),
+    samples=[f"{n:02}" for n in range(30)],
+    sample_start=[
+        datetime(1994, 10, 23, 15, tzinfo=timezone.utc) + timedelta(h) for h in range(30)
+    ],
+    sample_end=[datetime(1994, 10, 23, 18, tzinfo=timezone.utc) + timedelta(h) for h in range(30)],
+    flags={
+        0: "not sampled",
+        1: "valid sample, no tracer found",
+        11: "valid sample, tracer found",
+        21: "concentration within 2std of background variation",
+        31: "concentration given or higher",
+        41: "tracer detected, but can't be quantified",
+        10: "lost in sampling",
+        20: "lost in analysis",
+        30: "lost in shipment",
+    },
+)
+
+
+class ReadETEX1(ReadUngriddedBase):
+
+    __version__ = "0.0.0"
+    _FILEMASK = None
+    DATA_ID = "etex1"
+    DEFAULT_VARS = [ETEX1.variable_name]
+    PROVIDES_VARIABLES = DEFAULT_VARS
+    SUPPORTED_DATASETS = [DATA_ID]
+    TS_TYPE = "3hourly"
+
+    read_file = None
+
+    def read(
+        self, vars_to_retrieve=None, files=..., first_file=None, last_file=None
+    ) -> UngriddedData:
+        if isinstance(vars_to_retrieve, str):
+            assert (
+                vars_to_retrieve in self.PROVIDES_VARIABLES
+            ), f"this dataset only has {self.PROVIDES_VARIABLES}"
+        elif isinstance(vars_to_retrieve, list):
+            assert all(
+                var in self.PROVIDES_VARIABLES for var in vars_to_retrieve
+            ), f"this dataset only has {self.PROVIDES_VARIABLES}"
+
+        return UngriddedData.from_station_data(list(self.__reader()))
+
+    @classmethod
+    def __reader(cls) -> Generator[dict, None, None]:
+        station = read_stations().set_index("cc")
+        for cc, df in read_data().groupby("cc"):
+            site = station.loc[cc]
+            conc = df.rename(columns={"end": "time"}).set_index("time").concentration
+            conc.name = cls.DEFAULT_VARS[0]
+            yield dict(
+                station_id=site.name,
+                station_name=site["Station name"],
+                latitude=site.Long,
+                longitude=site.Lat,
+                altitude=site.Alt,
+                concch=conc,
+                var_info=dict(concch=dict(units=ETEX1.units, ts_type=cls.TS_TYPE)),
+            )
+
+
+def degrees_with_minutes(x: str) -> float:
+    """
+    trasnform station coordiantes "degree.minutes" to float
+    """
+    degrees, minutes = x.split(".")
+    return int(degrees) + int(minutes) / 60 * sign(float(x))
+
+
+def read_stations() -> pd.DataFrame:
+    return pd.read_csv(
+        ETEX1.stations,
+        delimiter=", ",
+        header=3,
+        skipfooter=26,
+        engine="python",
+        converters=dict(Lat=degrees_with_minutes, Long=degrees_with_minutes),
+    ).astype(
+        {
+            "cc": "string",
+            "Station name": "string",
+            "Lat": "float16",
+            "Long": "float16",
+            "Alt": "int16",
+            "WMOCode": "string",
+            "Remarks": "string",
+        }
+    )
+
+
+def read_pmch(path: Path, name: str, **kwargs) -> pd.DataFrame:
+    columns = ["index", "cc"] + ETEX1.samples
+    series = pd.read_csv(
+        path,
+        delim_whitespace=True,
+        header=1,
+        names=columns,
+        usecols=columns[1:],
+        index_col="cc",
+        **kwargs,
+    ).unstack()
+    series.index.names = ["sample", "cc"]
+    series.name = name
+    return series.reset_index()
+
+
+def read_data() -> pd.DataFrame:
+    dat = read_pmch(ETEX1.concentrations, "concentration", na_values=[-0.99, -0.88])
+    cod = read_pmch(ETEX1.quality, "quality")
+    cod["quality"] = pd.Categorical(cod.quality).rename_categories(ETEX1.flags)
+
+    time = pd.DataFrame(
+        {"sample": ETEX1.samples, "start": ETEX1.sample_start, "end": ETEX1.sample_end}
+    )
+    return pd.merge(dat, cod).merge(time, on="sample").drop("sample", axis="columns")
diff --git a/pyaerocom/io/readungridded.py b/pyaerocom/io/readungridded.py
index 8004c05c1..7ebb05096 100755
--- a/pyaerocom/io/readungridded.py
+++ b/pyaerocom/io/readungridded.py
@@ -12,34 +12,33 @@
 #
 ########################################################################
 
-import os
 import logging
+import os
 from pathlib import Path
-from pyaerocom.combine_vardata_ungridded import combine_vardata_ungridded
-from pyaerocom.exceptions import (DataRetrievalError,
-                                  NetworkNotImplemented, NetworkNotSupported)
 
-from pyaerocom.io.read_aeronet_sdav2 import ReadAeronetSdaV2
-from pyaerocom.io.read_aeronet_sdav3 import ReadAeronetSdaV3
+from pyaerocom import const, logger, print_log
+from pyaerocom.combine_vardata_ungridded import combine_vardata_ungridded
+from pyaerocom.exceptions import DataRetrievalError, NetworkNotImplemented, NetworkNotSupported
+from pyaerocom.helpers import varlist_aerocom
+from pyaerocom.io.cachehandler_ungridded import CacheHandlerUngridded
+from pyaerocom.io.read_aasetal import ReadAasEtal
 from pyaerocom.io.read_aeronet_invv2 import ReadAeronetInvV2
 from pyaerocom.io.read_aeronet_invv3 import ReadAeronetInvV3
+from pyaerocom.io.read_aeronet_sdav2 import ReadAeronetSdaV2
+from pyaerocom.io.read_aeronet_sdav3 import ReadAeronetSdaV3
 from pyaerocom.io.read_aeronet_sunv2 import ReadAeronetSunV2
 from pyaerocom.io.read_aeronet_sunv3 import ReadAeronetSunV3
+from pyaerocom.io.read_airnow import ReadAirNow
 from pyaerocom.io.read_earlinet import ReadEarlinet
 from pyaerocom.io.read_ebas import ReadEbas
-from pyaerocom.io.read_aasetal import ReadAasEtal
-from pyaerocom.io.read_gaw import ReadGAW
-from pyaerocom.io.read_ghost import ReadGhost
 from pyaerocom.io.read_eea_aqerep import ReadEEAAQEREP
 from pyaerocom.io.read_eea_aqerep_v2 import ReadEEAAQEREP_V2
-from pyaerocom.io.read_airnow import ReadAirNow
+from pyaerocom.io.read_etex1 import ReadETEX1
+from pyaerocom.io.read_gaw import ReadGAW
+from pyaerocom.io.read_ghost import ReadGhost
 from pyaerocom.io.read_marcopolo import ReadMarcoPolo
-
-from pyaerocom.io.cachehandler_ungridded import CacheHandlerUngridded
 from pyaerocom.ungriddeddata import UngriddedData
-from pyaerocom.helpers import varlist_aerocom
 
-from pyaerocom import const, print_log, logger
 
 class ReadUngridded(object):
     """Factory class for reading of ungridded data based on obsnetwork ID
@@ -62,6 +61,7 @@ class ReadUngridded(object):
                          ReadAeronetSunV3,
                          ReadEarlinet,
                          ReadEbas,
+                         ReadETEX1,
                          ReadGAW,
                          ReadAasEtal,
                          ReadGhost,
@@ -794,4 +794,4 @@ def __str__(self):
                            data_dirs={'EBASMC' : ebas_local}
                            )
 
-    data = reader.read('EBASMC', 'ac550aer')
\ No newline at end of file
+    data = reader.read('EBASMC', 'ac550aer')
diff --git a/tests/io/test_read_etex1.py b/tests/io/test_read_etex1.py
new file mode 100644
index 000000000..e2180c9f6
--- /dev/null
+++ b/tests/io/test_read_etex1.py
@@ -0,0 +1,18 @@
+import pytest
+from pyaerocom.io.read_etex1 import ReadETEX1
+from pyaerocom.io.readungridded import ReadUngridded
+from pyaerocom.ungriddeddata import UngriddedData
+
+from ..conftest import lustre_unavail
+
+
+@lustre_unavail
+def test_read_etex1():
+    data = ReadETEX1()
+    assert isinstance(data, UngriddedData)
+
+
+@lustre_unavail
+def test_read_ungridded():
+    data = ReadUngridded().read("etex1", "concch")
+