Lakes in Northern Ireland
Find lakes in Northern Ireland: 20 named lakes in this catalog, sampled 2022–2024. 20 have total phosphorus, Values are the authority's own measurements, shown as reported.
Updated 2024
Lake map
Map shows 20 lakes with coordinates
Named lakes
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| Cam Lough | Northern Ireland | 50 µg/L | — | — | 2024 |
| Castlehume Lough | Northern Ireland | 30 µg/L | — | — | 2024 |
| Clea Lakes | Northern Ireland | 110 µg/L | — | — | 2024 |
| Lough Beg | Northern Ireland | 130 µg/L | — | — | 2024 |
| Lough Fea | Northern Ireland | 20 µg/L | — | — | 2024 |
| Lough Gullion | Northern Ireland | 200 µg/L | — | — | 2024 |
| Lough Island Reavy Reservoir | Northern Ireland | 20 µg/L | — | — | 2024 |
| Lough Melvin | Northern Ireland | 40 µg/L | — | — | 2024 |
| Lough Mourne | Northern Ireland | 60 µg/L | — | — | 2024 |
| Lough Neagh | Northern Ireland | 140 µg/L | — | — | 2022 |
| Lough Ross | Northern Ireland | 70 µg/L | — | — | 2024 |
| Lough Scolban | Northern Ireland | 30 µg/L | — | — | 2024 |
| Lower Lough Erne | Northern Ireland | 60 µg/L | — | — | 2024 |
| Lower Lough Macnean | Northern Ireland | 35 µg/L | — | — | 2024 |
| Portmore Lough | Northern Ireland | 260 µg/L | — | — | 2024 |
| Silent Valley Reservoir | Northern Ireland | 30 µg/L | — | — | 2024 |
| Spelga Dam | Northern Ireland | 20 µg/L | — | — | 2024 |
| Stonyford Reservoir | Northern Ireland | 80 µg/L | — | — | 2024 |
| Upper Lough Erne | Northern Ireland | 70 µg/L | — | — | 2024 |
| Upper Lough Macnean | Northern Ireland | 30 µg/L | — | — | 2024 |
Get Northern Ireland water-quality updates
New official ratings and water-quality readings for lakes in Northern Ireland. Unsubscribe anytime.
Frequently asked questions
- How is lake water quality measured in Northern Ireland?
- 20 named lakes in Northern Ireland have official phosphorus from the Northern Ireland Environment Agency (DAERA), 2022–2024. These are the authority's own measurements, shown as reported.
- Whose ratings do the Northern Ireland lake pages show?
- The publishing authority's own. Pages for lakes in Northern Ireland show the values and classes that authority reports, with the season or year each was taken.
Lakes in other countries
Directory of official lake water quality
Rated bathing waters at campgrounds
Water quality for lakes in Norway
Water quality for lakes in South Korea
Water quality for lakes in Taiwan
Water quality for lakes in Uruguay
Water quality for lakes in Germany
Water quality for lakes in France
Water quality for lakes in Italy
Water quality for lakes in Netherlands
Where to stay near Northern Ireland
Lakeside cabins, hotels, and vacation rentals near Northern Ireland — live availability from Booking.com, Vrbo and Expedia.
Top-rated places to stay near Northern Ireland
Prices for Oct 2–4, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Northern Ireland?
Get lake water-quality updates plus the best cabin & lodging deals near Northern Ireland — straight to your inbox. No spam, unsubscribe anytime.