diff --git a/rastervision_aws_s3/rastervision/aws_s3/s3_file_system.py b/rastervision_aws_s3/rastervision/aws_s3/s3_file_system.py
index 12cacfa6c..e45ac6c65 100644
--- a/rastervision_aws_s3/rastervision/aws_s3/s3_file_system.py
+++ b/rastervision_aws_s3/rastervision/aws_s3/s3_file_system.py
@@ -6,7 +6,6 @@
 from urllib.parse import urlparse
 
 import boto3
-from everett.manager import ConfigurationMissingError
 from tqdm.auto import tqdm
 
 from rastervision.pipeline.file_system import (FileSystem, NotReadableError,
@@ -102,16 +101,18 @@ class S3FileSystem(FileSystem):
     """
 
     @staticmethod
-    def get_request_payer():
-        # Import here to avoid circular reference.
-        from rastervision.pipeline import rv_config_ as rv_config
-        try:
-            s3_config = rv_config.get_namespace_config(AWS_S3)
-            # 'None' needs the quotes because boto3 cannot handle None.
-            return ('requester' if s3_config(
-                'requester_pays', parser=bool, default='False') else 'None')
-        except ConfigurationMissingError:
-            return 'None'
+    def get_request_payer() -> str:
+        # attempt to get from environ
+        request_payer = os.getenv('AWS_REQUEST_PAYER', 'None')
+        # attempt to get from RV config
+        if request_payer == 'None':
+            # Import here to avoid circular reference.
+            from rastervision.pipeline import rv_config_ as rv_config
+            requester_pays = rv_config.get_namespace_option(
+                AWS_S3, 'requester_pays', as_bool=True)
+            if requester_pays:
+                request_payer = 'requester'
+        return request_payer
 
     @staticmethod
     def get_session():
diff --git a/rastervision_core/rastervision/core/data/raster_source/rasterio_source.py b/rastervision_core/rastervision/core/data/raster_source/rasterio_source.py
index 6c8d3fd29..a3ebb637e 100644
--- a/rastervision_core/rastervision/core/data/raster_source/rasterio_source.py
+++ b/rastervision_core/rastervision/core/data/raster_source/rasterio_source.py
@@ -2,7 +2,7 @@
 import logging
 
 import numpy as np
-import rasterio
+import rasterio as rio
 
 from rastervision.pipeline.file_system import download_if_needed, get_tmp_dir
 from rastervision.core.box import Box
@@ -11,8 +11,8 @@
 from rastervision.core.data.utils import (listify_uris, parse_array_slices_Nd)
 from rastervision.core.data.utils.raster import fill_overflow
 from rastervision.core.data.utils.rasterio import (
-    read_window, get_channel_order_from_dataset, download_and_build_vrt,
-    is_masked)
+    download_and_build_vrt, get_aws_session, get_channel_order_from_dataset,
+    is_masked, read_window)
 
 if TYPE_CHECKING:
     from rastervision.core.data import RasterTransformer
@@ -76,7 +76,11 @@ def __init__(self,
 
         self.imagery_path = self.download_data(
             self.tmp_dir, stream=self.allow_streaming)
-        self.image_dataset = rasterio.open(self.imagery_path)
+        self.session = None
+        if 's3://' in self.imagery_path.lower():
+            self.session = get_aws_session()
+        with rio.Env(session=self.session):
+            self.image_dataset = rio.open(self.imagery_path)
 
         block_shapes = set(self.image_dataset.block_shapes)
         if len(block_shapes) > 1:
@@ -165,7 +169,8 @@ def _get_chip(self,
             bands=bands,
             window=window.rasterio_format(),
             is_masked=self.is_masked,
-            out_shape=out_shape)
+            out_shape=out_shape,
+            session=self.session)
         chip = fill_overflow(self.bbox, window, chip)
         return chip
 
diff --git a/rastervision_core/rastervision/core/data/utils/rasterio.py b/rastervision_core/rastervision/core/data/utils/rasterio.py
index 00a3ac4df..4fb31f32a 100644
--- a/rastervision_core/rastervision/core/data/utils/rasterio.py
+++ b/rastervision_core/rastervision/core/data/utils/rasterio.py
@@ -8,6 +8,7 @@
 import rasterio.windows as rio_windows
 from rasterio.transform import from_origin
 from rasterio.enums import (ColorInterp, MaskFlags, Resampling)
+from rasterio.session import AWSSession
 
 from rastervision.pipeline.file_system.utils import (
     file_to_json, get_local_path, get_tmp_dir, make_dir, upload_or_copy,
@@ -16,6 +17,7 @@
 
 if TYPE_CHECKING:
     from rasterio.io import DatasetReader
+    from rasterio.session import Session
 
 log = logging.getLogger(__name__)
 
@@ -168,7 +170,8 @@ def read_window(dataset: 'DatasetReader',
                 bands: int | Sequence[int] | None = None,
                 window: tuple[tuple[int, int], tuple[int, int]] | None = None,
                 is_masked: bool = False,
-                out_shape: tuple[int, ...] | None = None) -> np.ndarray:
+                out_shape: tuple[int, ...] | None = None,
+                session: 'Session | None' = None) -> np.ndarray:
     """Load a window of an image using Rasterio.
 
     Args:
@@ -181,19 +184,21 @@ def read_window(dataset: 'DatasetReader',
             Defaults to ``False``.
         out_shape: (height, width) of the output chip. If ``None``, no
             resizing is done. Defaults to ``None``.
+        session: Rasterio :class:`.Session`.
 
     Returns:
         np.ndarray: array of shape (height, width, channels).
     """
     if bands is not None:
         bands = tuple(bands)
-    im = dataset.read(
-        indexes=bands,
-        window=window,
-        boundless=True,
-        masked=is_masked,
-        out_shape=out_shape,
-        resampling=Resampling.bilinear)
+    with rio.Env(session=session):
+        im = dataset.read(
+            indexes=bands,
+            window=window,
+            boundless=True,
+            masked=is_masked,
+            out_shape=out_shape,
+            resampling=Resampling.bilinear)
 
     if is_masked:
         im = np.ma.filled(im, fill_value=0)
@@ -241,3 +246,15 @@ def is_masked(dataset: 'DatasetReader') -> bool:
     mask_flags = dataset.mask_flag_enums
     is_masked = any(m for m in mask_flags if m != MaskFlags.all_valid)
     return is_masked
+
+
+def get_aws_session() -> 'Session':
+    """Build a rasterio AWS session from environment variables."""
+    try:
+        from rastervision.aws_s3 import S3FileSystem
+        requester_pays = S3FileSystem.get_request_payer()
+    except ModuleNotFoundError:
+        requester_pays = os.getenv('AWS_REQUEST_PAYER',
+                                   '').lower() == 'requestor'
+    session = AWSSession.from_environ(requester_pays=requester_pays)
+    return session
diff --git a/tests/aws_s3/test_s3_file_system.py b/tests/aws_s3/test_s3_file_system.py
index d2e54283a..6970ead37 100644
--- a/tests/aws_s3/test_s3_file_system.py
+++ b/tests/aws_s3/test_s3_file_system.py
@@ -12,6 +12,21 @@ def test_get_client_unsigned(self):
         s3 = S3FileSystem.get_client()
         self.assertEqual(s3._client_config.signature_version, UNSIGNED)
 
+    @patch.dict('os.environ', AWS_REQUEST_PAYER='requester')
+    def test_get_request_payer_env(self):
+        request_payer = S3FileSystem.get_request_payer()
+        self.assertEqual(request_payer, 'requester')
+
+    @patch.dict('os.environ', AWS_S3_REQUESTER_PAYS='yes')
+    def test_get_request_payer_rvconfig_env_true(self):
+        request_payer = S3FileSystem.get_request_payer()
+        self.assertEqual(request_payer, 'requester')
+
+    @patch.dict('os.environ', AWS_S3_REQUESTER_PAYS='false')
+    def test_get_request_payer_rvconfig_env_false(self):
+        request_payer = S3FileSystem.get_request_payer()
+        self.assertEqual(request_payer, 'None')
+
 
 if __name__ == '__main__':
     unittest.main()
diff --git a/tests/core/data/utils/test_rasterio.py b/tests/core/data/utils/test_rasterio.py
index 37e754eac..100514b95 100644
--- a/tests/core/data/utils/test_rasterio.py
+++ b/tests/core/data/utils/test_rasterio.py
@@ -1,4 +1,5 @@
 import unittest
+from unittest.mock import patch
 from os.path import join
 
 import numpy as np
@@ -7,7 +8,7 @@
 from rastervision.pipeline.file_system.utils import get_tmp_dir
 from rastervision.core.box import Box
 from rastervision.core.data.utils.rasterio import (
-    crop_geotiff, write_geotiff_like_geojson, write_bbox)
+    crop_geotiff, get_aws_session, write_geotiff_like_geojson, write_bbox)
 from rastervision.core.data import RasterioSource, GeoJSONVectorSource
 from tests import data_file_path
 
@@ -63,6 +64,17 @@ def test_write_geotiff_like_geojson(self):
                 decimal=3)
             self.assertEqual(rs.shape, (10, 10, 1))
 
+    @patch.dict('os.environ', AWS_REQUEST_PAYER='requester')
+    def test_get_aws_session(self):
+        session = get_aws_session()
+        self.assertTrue(session.requester_pays)
+
+    @patch.dict('sys.modules', {'rastervision.aws_s3': None})
+    @patch.dict('os.environ', AWS_S3_REQUESTER_PAYS='false')
+    def test_get_aws_session_no_rv_aws_s3_and_not_requester_pays(self):
+        session = get_aws_session()
+        self.assertFalse(session.requester_pays)
+
 
 if __name__ == '__main__':
     unittest.main()