High-Frequency Water Quality Measurements from the Six Mile River

A field probe records Dissolved Oxygen (%Saturation) and temperature (°C) every 30 minutes in the Six Mile River downstream of Castle Farm Bridge, Antrim. Data is collected by NIEA’s Freshwater Monitoring and Assessment team as part of a long-term project and is loaded to the public platform approximately every 30 days. The data is provisional and non-validated, with sensor accuracies of +/- 5% for dissolved oxygen and +/- 0.1°C for temperature.

Use Cases

• Modeling diurnal and seasonal dissolved oxygen cycles based on high-frequency 30-minute measurements.
• Analyzing water temperature trends and their correlation with environmental factors.
• Developing anomaly detection systems for sensor malfunction or environmental events based on provisional data streams.
• Calibrating or validating hydrological models for the Six Mile River catchment area.

Strengths

• High-frequency temporal resolution with measurements recorded every 30 minutes.
• Sensor specifications are documented, including accuracy of +/- 5% for dissolved oxygen and +/- 0.1°C for temperature.
• Data is part of a long-term monitoring project, suggesting a commitment to ongoing data collection.

Limitations

• Data is explicitly flagged as non-validated and provisional, subject to revision.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and total temporal coverage are unknown, which may limit suitability assessment.

Provenance

Source

NIEA’s Freshwater Monitoring and Assessment team, published via OpenDataNI.

Collection Method

Collected by an optical DO sensor and temperature sensor deployed at a fixed location.

Freshness

Data is updated approximately monthly; last metadata update was 2026-03-18.

Geography

Six Mile River downstream of Castle Farm Bridge, Antrim, Northern Ireland.