Vale of Glamorgan - Live Sewage

Polluted by sewage 5,665 hours in 2026 so far..

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Vale of Glamorgan so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

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Constituencies near Vale of Glamorgan

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Vale of Glamorgan, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.

Each CSO has a row, the most recent data is on the right hand side.

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Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
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Totals so far

Company CSO ID Overflow Days Total Duration (hours) Total Duration (days)
Dwr Cymru Welsh Water 76229c87fa713636f9c2ee324e8a3730bde827b9698e4fb22ea0032831702edb 46 865 h 36.04
Dwr Cymru Welsh Water 18a2de75661dac86cccf2818fdf71910725f8de3f803a39c0dd6d2e8b916d19a 36 739 h 30m 30.79
Dwr Cymru Welsh Water e0899f539365797bf579fe0f6a4a200e36c4dc2ef0dd27004b275a69bf87789f 30 626 h 33m 26.08
Dwr Cymru Welsh Water dbd7c044a82b8f04e1175b6c0cdf7be1e3663594f974c3a8c28448edac905597 37 617 h 15m 25.71
Dwr Cymru Welsh Water 9300ebe177cee0fbe60662f2d407c67bce1cd0022c2fb98fba9c4c302aed25d1 25 571 h 30m 23.79
Dwr Cymru Welsh Water f9911f51eaad28a8026bff3415c95a58f16f013683cafb185b2da8da3f448d2c 33 472 h 30m 19.67
Dwr Cymru Welsh Water f89f1f0b3412128d76df278228a353254f49bc34b4736f853a231b4c611bc7b1 26 460 h 45m 19.17
Dwr Cymru Welsh Water 41ed492fc64afe45027465ddfb6da80461aa37893d52c51d32fb2f8bfda0999d 19 380 h 19m 15.83
Dwr Cymru Welsh Water 7095f3dfdf5344dfdffc60b5622e8e475a09f270304e17f3505d4e6cf3179f6a 27 333 h 30m 13.88
Dwr Cymru Welsh Water febc4d353eba1bb886b80ddeb695a980d7b7eb7cfad1f044e0b4d945840e5b29 26 114 h 24m 4.75
Dwr Cymru Welsh Water a44962691b00de2baf5443e54f58dd7800b0dc4b731663963a99a9e377fd92bd 20 104 h 14m 4.33
Dwr Cymru Welsh Water b66960bbc798cd89dbd76c1219d925f367ed12967897923f751e94307508f452 4 70 h 15m 2.92
Dwr Cymru Welsh Water 17b90b897ed892a497348da0aedb6cd603f27f96491125fcbd955c1ac7e05bf5 15 67 h 15m 2.79
Dwr Cymru Welsh Water d2e16f81ccfaea063464a69d50d248ea333463052e3c250bef3349c920a26979 33 63 h 1m 2.62
Dwr Cymru Welsh Water 7146e46efb3b4394070767a8262633054c781722529962b04dee3b276959167f 7 57 h 2.38
Dwr Cymru Welsh Water dae9a227baa67cf8415d496ac11680e9ba8461b173c0875fce5a1b0b1adbcf8c 6 51 h 2.12
Dwr Cymru Welsh Water 9c82b9d90fa3e754eceecb42cd49d5192835802ae3a343a8d6d7adf2e9ac817f 2 24 h 30m 1
Dwr Cymru Welsh Water 5bc3e8655823ac7bbba9cdfa5a4bee50c9330b918ab6be6e75553ab9ef92f128 5 12 h 45m 0.5
Dwr Cymru Welsh Water 9ac7cb0007e7e1fd680c4f9badb2c0296f0eb13aff7f0e2c161a11e165cfaef7 2 12 h 0.5
Dwr Cymru Welsh Water 56582b2d5e8286af6dfdaedf457aab38dbcf7896483e79a55055bd1d07e9e12e 2 7 h 27m 0.29
Dwr Cymru Welsh Water 11f87d5cd10d598f78545c918ccaf12cf9855854e33b9ac979d9f290a3a11b22 3 4 h 58m 0.17
Dwr Cymru Welsh Water 4ac22b4b6ae29e03360ca77a47c3502f587ea88afdae18b53651da0fa5580f64 1 3 h 29m 0.12
Dwr Cymru Welsh Water e1a9079f8a87be7476f66dc8c3f530059d0398a91e4003dd16b1941ce787e28f 2 2 h 14m 0.08
Dwr Cymru Welsh Water 37db491542fc3d6983dc3a24e87a6739329703e4a703bdf6efa57f04a0475285 2 1 h 45m 0.04
Dwr Cymru Welsh Water 1aa28044019c7e01d3a95f39dd98a1552d941231705a3f046f12cb8f4ede4ba1 1 1 h 14m 0.04
Dwr Cymru Welsh Water c1863b2e937c5f5423b96558b40808b494a5bcec0cf484cf5e097914d984ac80 1 0 h 30m 0
Dwr Cymru Welsh Water 2e0524aa961b991fa07fc86b50e16b09bf5d9e0b90a299dbfe9b21fb97b317f3 1 0 h 27m 0
Dwr Cymru Welsh Water 7e69fdd512ffa31bc73750f542b04e7f4a24096ebb403ff3846643356f1abfd1 1 0 h 15m 0
Dwr Cymru Welsh Water 7af85fa6d83d1e0a04a90a104a3b4e032088b74cb525e264fd2b85c13b945db8 0 0 h 0
Dwr Cymru Welsh Water dbf137ae05b93dc92f2705af16dac88f83a348b66e30ae3465c3fecee1a79360 0 0 h 0
Dwr Cymru Welsh Water 10398d9bf7c8770f3e2c7d77ff7fddf95f1b7a27778c202cc450098866bb24cc 0 0 h 0
Dwr Cymru Welsh Water 42bb82bb37d55766cdb1b9ccf0a86d8cfdf858426090559d9502efaf7eb08246 0 0 h 0
Dwr Cymru Welsh Water 2745a4332929f4d4dc50954e37150e0241387de86f2a20765b652561df8a7ac8 0 0 h 0
Dwr Cymru Welsh Water 2d4ed54c169b45a26a9630d090b9b579b6b9e3d015b86ec594740c2dfe46133c 0 0 h 0
Dwr Cymru Welsh Water f4524fbba7d1cfcd0e76f03e87cb5aef7d455a0b9170b8eee52a1b33266fd089 0 0 h 0
Dwr Cymru Welsh Water 90f47a0996bce51d43b2808c86425ec66f7dc626da006a569dd14ac423efaf5f 0 0 h 0
Dwr Cymru Welsh Water 20bf5ef5b118ae2486072727010d0873ba223784e7e6a09c513c55878675f7e6 0 0 h 0
Dwr Cymru Welsh Water bced08a1a5d168122c71081a32f4c8167e376aca76fc83bbd7ee61678546dcc9 0 0 h 0
Dwr Cymru Welsh Water 36db16e43719e0b5cfc702fa902b18646dca412c0c5dafe1eae9ee9b1abdd9f6 0 0 h 0
Dwr Cymru Welsh Water 92cfa8e20849cd4f0c2847f9b22b9b9e463d51ef857057a4ccd4b733f72cbb53 0 0 h 0
Dwr Cymru Welsh Water 5ca674c379118c7dfa2d45a3773e065a25f35d28e2e72ee65cd30eff02e1a950 0 0 h 0
Dwr Cymru Welsh Water 4760ac68292f2eb662c1da2e7b5e1bd2e3070af4eae171813cdb4f3f9c14683f 0 0 h 0
Dwr Cymru Welsh Water 6955d2b98eceea4e2c3e1541d9c4176f025fde9af038ba5ac3b58a15ba4e38e1 0 0 h 0
Dwr Cymru Welsh Water 0003b4fb575502b47cf921112c24667d21ab0bce7df83dc64015b93555ab5890 0 0 h 0
Dwr Cymru Welsh Water b47aa5b2202e9634107546e6e7a74e54dd712c58e76a2a7054d8c1867188a46c 0 0 h 0
Dwr Cymru Welsh Water 357ec55f9b75152db0915c38c91e4156726e40038865ebd1ac151347368ece62 0 0 h 0
Dwr Cymru Welsh Water 82e03b79a5906157587215d091a9279d66f3c7f939de030fcc1fd7763acf756a 0 0 h 0
Dwr Cymru Welsh Water 621272a31ff89195f88b1da2209e22a5d4d0207dc3bd3c1f22558676b9f4940a 0 0 h 0
Dwr Cymru Welsh Water 01285001fa4bf5ac149d44391748e7c7e71c220fb8d0a3ed2213143dc58b352e 0 0 h 0
Dwr Cymru Welsh Water 7332b527b734b0f7432a9990f5321e8f9f8695502b4cd1207a4d06307ca33f29 0 0 h 0
Dwr Cymru Welsh Water b30ffb2b4726e42228476c792937ed77765e8479a19b138bb7ae2e2d37724093 0 0 h 0
Dwr Cymru Welsh Water a81d5bee656d2a7cf0e6f1c78c08032e50eff221b1e0e4d5d02c6a4ce654ff99 0 0 h 0
Dwr Cymru Welsh Water 7351cce4b6579c0b8d1f5681fa0118ba3f83faca75562118b42e31bbc97211a7 0 0 h 0
Dwr Cymru Welsh Water 76c531d8429c2bacdd9af04bafb3061b79addb4b199f2c278ba93752721f335f 0 0 h 0
Dwr Cymru Welsh Water c0e07ccb5eefcd7f057b19f7f2b5aa8f29e3738d8d84544cbec0f4b5130b6ebe 0 0 h 0
Dwr Cymru Welsh Water a201a5990785efd46cf0cd57e6d29e3dcfdca294693a02e7106e38b2dbf520c3 0 0 h 0
Dwr Cymru Welsh Water 2e572d80d4f0f4b5cafef772cc70baedd1c4d46bc3e50a5f629362cd4ad1ebb9 0 0 h 0
Dwr Cymru Welsh Water b741a1206abb269666868a3d2e76b467fbf1e4dd95f1205823810598512c0f74 0 0 h 0

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water

Experimental derived data from Thames Water API, Some data may be missing or inaccurate. Live sewage data from Stream Water API

Uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.

This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.

This project is not associated, approved or endorsed by any of the companies whose logos you see here.

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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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