River TruthRiver Truth
← River Truth

Yorkshire Water · overflow YWS01804

No active event

River Calder

Yorkshire Water reports no current spill. In the last 30 days the overflow has discharged a cumulative 29.1 h across 8 events.

📍 53.73877°, -2.00951°

Truth Engine flags· 1 open

Spill record· last 12 months

8

spill events

205h

cumulative discharge

7 days

longest single event (all time)

2026-05-02

first event on record

In the last 30 days this overflow recorded 205h of discharge. Across Yorkshire Water's 2,184 monitored overflows the median was 0h. This site is in the top 2% by 30-day spill duration.

On the River Calder· 87 other overflows

87 other overflows discharge into the River Calder. 1 is currently reporting an active spill. 1 has its monitor offline. Combined recorded discharge in the last 30 days: 2318h. Operated by 2 different water companies.

Recent spill events· last 30 days

Nearby water quality· 6 sampling points within 5 km

  • NE-49500612 · FRESHWATER - RIVERS

    CALDER AT HEBDEN BRIDGE (VICTORIA BRIDGE)

    24 m away

    No swimmer-relevant measurements available.

  • NE-49500677 · FRESHWATER - CANALS

    ROCHDALE CANAL AT HEBDEN BRIDGE

    75 m away

    No swimmer-relevant measurements available.

  • NE-49500377 · FRESHWATER - RIVERS

    HEBDEN WATER AT HEBDEN BRIDGE

    433 m away

    No swimmer-relevant measurements available.

  • NE-RSN2108 · FRESHWATER - RIVERS

    RSN2108 CALDER D/S HEBDEN BRIDGE

    646 m away

    No swimmer-relevant measurements available.

  • NE-49500614 · FRESHWATER - RIVERS

    CALDER AT HEPTONSTALL TURNING CIRCLE

    1.1 km away

    No swimmer-relevant measurements available.

  • NE-49500388 · FRESHWATER - RIVERS

    HEBDEN WATER AT MIDGEHOLE - HEBDEN BRIDGE

    2.2 km away · last tested 9 days ago

    • pH7.97 PHUNITS
    • Water temperature8.7 CEL

Take action

The record above is verifiable from public Environment Agency and water-company data. Three official accountability channels — pre-filled with the evidence on this page.

Are you here right now?

If you can see foam, sewage debris, dead fish, or smell something wrong — submit a citizen report. Confirmed reports are added to the Truth Engine and strengthen the public record on this overflow.

📷 Report what you saw →

1. Complain to Yorkshire Water

The official complaints route. Most companies require submission through their web form rather than email — open the form, then paste the pre-filled letter.

Preview the letter
Subject: Complaint: storm overflow YWS01804 on the River Calder

Dear Yorkshire Water,

I am writing to formally raise a concern about storm overflow YWS01804,
which public Environment Agency data shows recording 8 spill events totalling 29.1 h in the last 30 days into the River Calder.

Evidence:
- Last 30 days: 8 spill events totalling 29.1 h
- Cross-referenced flags from independent monitoring: 1 open Truth Engine discrepancies
- Location: 53.73877, -2.00951
- Source: Environment Agency National Storm Overflow Hub, OGL v3, cross-referenced via River Truth (https://rivertruth.co.uk/overflow/6172)

[Add your personal context here — e.g. how you use this stretch of water and how this incident affects you.]

Please respond with:
1. The cause of this discharge or monitor outage
2. The action being taken to resolve it
3. The expected timeline for resolution
4. What measures are in place to prevent recurrence

I have copied the Environment Agency, Ofwat, and my MP into this correspondence
where appropriate.

Yours faithfully,
[Your name]
[Your address]
[Your customer reference if you are a Yorkshire Water customer]

2. Write to the MP for this stretch

This overflow sits in the Calder Valley constituency — currently represented by Josh Fenton-Glynn (Labour). Click below to open WriteToThem with the letter copied to your clipboard — paste it into the message box.

Or write to your own MP instead

Prefer to write to the MP for where you live? Enter your postcode and we'll redirect WriteToThem accordingly.

Preview the letter
Subject: Constituent concern: Yorkshire Water sewage discharge — overflow YWS01804

Dear [your MP — WriteToThem will fill this in],

I am writing as your constituent to raise concern about ongoing sewage discharges
from Yorkshire Water in our area.

A specific recent example is storm overflow YWS01804, which public
Environment Agency data shows recording 8 spill events totalling 29.1 h in the last 30 days into the River Calder.

Evidence on the public record:
- Last 30 days: 8 spill events totalling 29.1 h
- Cross-referenced flags from independent monitoring: 1 open Truth Engine discrepancies
- Location: 53.73877, -2.00951
- Source: Environment Agency National Storm Overflow Hub, OGL v3, cross-referenced via River Truth (https://rivertruth.co.uk/overflow/6172)

[Add your personal context here — e.g. how you use this stretch of water and how this incident affects you and your family.]

I would like to ask:
1. Whether you support strengthening the regulatory regime for storm overflows
   and monitor coverage in particular
2. Whether you would raise this specific incident with the Secretary of State
   for Environment, Food and Rural Affairs or with Ofwat
3. What steps Parliament is taking to hold Yorkshire Water accountable for
   the gap between shareholder distributions and the state of monitoring on
   the ground

Yours sincerely,
[Your name]
[Your address — WriteToThem requires a postal address to verify constituency]

Sources: Environment Agency National Storm Overflow Hub · Environment Agency
WIMS Water Quality Archive · cross-referenced via River Truth (https://rivertruth.co.uk/overflow/6172)

MP details are looked up live from the UK Parliament Members API under the Open Parliament Licence v3.0. River Truth makes no claim about this MP's voting or advocacy record on water issues — they are shown solely as the elected representative for this constituency.

3. Report to the Environment Agency

For active pollution incidents — dead fish, foam, sewage on the riverbank — the EA hotline operates 24/7 and triggers a recorded investigation.

Share to X →