In short: Dirial Tea Estate is a black tea producer in Tinsukia, Assam, operated by Mcleod Russel India Ltd., located at approximately 116 metres above sea level.
Dirial Tea Estate is a black tea producer situated in the Tinsukia district of Assam, India, at an elevation of approximately 116 metres above sea level. The estate is operated by Mcleod Russel India Ltd., historically one of the largest tea producers globally. No buyers are currently recorded in publicly available supply chain data.
Terroir & Climate
At 116 metres above sea level, Dirial sits within the low-elevation plains characteristic of Upper Assam's Tinsukia district. Estates at this altitude in the Brahmaputra valley typically experience a warm, humid subtropical climate with heavy monsoon rainfall, conditions that generally favour vigorous vegetative growth and year-round production cycles. The low elevation and fertile alluvial soils tend to produce teas with strong, malty character rather than the more delicate or floral notes associated with high-grown estates.
Tinsukia's climate typically supports rapid leaf growth, with flush cycles often extending from March through November. The warm temperatures and ample moisture at this elevation generally result in robust, fast-growing leaf that can be processed into the full-bodied, brisk black teas for which Assam is known. Frost is rare at this altitude, and the extended growing season tends to allow for high yields, though the organoleptic profile often emphasises strength and body over aromatic complexity.
Tea Produced
As a black tea producer in Tinsukia, Dirial's output would typically be processed in the CTC (crush, tear, curl) or orthodox styles common to Assam. Low-elevation Assam estates generally yield teas with a strong malty character, pronounced body, and brisk astringency—qualities that have long made the region a backbone of blended breakfast teas and strong, everyday brews. The cup profile at this altitude tends toward bold, robust flavours with limited floral or aromatic nuance, though well-made orthodox leaf from the second flush can sometimes exhibit a richer, more rounded maltiness.
Operator
Mcleod Russel India Ltd. operates Dirial, and six other estates in this directory are recorded under the same management. Once the world's largest tea producer by volume, Mcleod Russel has a long-established footprint in Assam and other Indian growing regions, with a portfolio that has historically supplied both domestic and international blenders. The company's scale and operational reach have made it a significant force in global black tea supply chains.
Certifications & Ethics
Dirial Tea Estate holds certification from the Ethical Tea Partnership, an industry body that works with producers on social, environmental, and labour standards. For buyers, this certification signals a commitment to continuous improvement in working conditions, occupational health and safety, and environmental stewardship, verified through third-party monitoring. For workers and communities, ETP membership typically entails regular audits and remediation programmes addressing issues such as wages, housing, and access to grievance mechanisms.
Location & Neighbouring Estates
Dirial Tea Estate lies at 27.4022, 95.2776 in Tinsukia, India. Its 116 m elevation is the joint 144th highest of 250 estates we map in India. The nearest estates in the TeaTrade directory, measured point-to-point from these coordinates, are:
- Bordubi Tea Estate — 3.7 km away · Bordubi No.1
- Maud Tea Estate — 5.6 km away · Chetia Pathar
- Keyhung Tea Estate — 6.3 km away · Assam
- Itakhooli Tea Estate — 9.2 km away · Assam
- Rungagora J — 12 km away · Assam
Estates at a Similar Altitude to Dirial Tea Estate
Elevation shapes how slowly leaf matures, so we match Dirial Tea Estate (116 m) with estates within 150 m of its height that are not its neighbours. Each is shown with its own 2025 climate. Dirial Tea Estate recorded 3,021 mm in 2025, 17% more than the 2,584 mm average across these estates: at the same height, local weather and exposure matter as much as elevation.
| Estate | Where | Elevation | Rain 2025 | Mean high |
|---|---|---|---|---|
| Hunwal Tea Estate | Assam, India | 116 m | 2,483 mm | 28.5 °C |
| Dufflaghur Tea Estate | Sonitpur, India | 115 m | 2,830 mm | 28.6 °C |
| Yalta | Southern Province, Sri Lanka | 117 m | 2,624 mm | 30.0 °C |
| KDU, Deerwood | Sabaragamuwa Province, Sri Lanka | 119 m | 4,668 mm | 29.5 °C |
| Rooibos Limited | Western Cape, South Africa | 112 m | 313 mm | 27.4 °C |
Dirial Tea Estate Compared with India
In India, Dirial Tea Estate is wetter than 71% of the others by 2025 rainfall; lower than 58% of the others by elevation; cooler than 62% of the others by daytime temperature. The table sets Dirial Tea Estate against the 249 other estates we map in India, so you can see whether it is typical for its country or an outlier.
| Measure | Dirial Tea Estate | Country median | Country range |
|---|---|---|---|
| Elevation | 116 m | 126 m | 6 to 2,299 m |
| Annual rainfall (2025) | 3,021 mm | 2,778 mm | 745 to 4,774 mm |
| Mean daily high | 28.0 °C | 28.3 °C | 16.9 to 34.5 °C |
| Mean overnight low | 19.3 °C | 19.2 °C | 9.3 to 24.2 °C |
Observed Climate at Dirial Tea Estate (2025)
ERA5 reanalysis data modelled for Dirial Tea Estate’s coordinates recorded 3,021 mm of precipitation across calendar year 2025. The wettest month was August (592 mm) and the driest was December (8 mm). Daytime highs averaged 28.0 °C and overnight lows 19.3 °C over the year; July was the warmest month and January the coolest.
| Metric | 2025 value |
|---|---|
| Annual precipitation | 3,021 mm |
| Wettest month | August (592 mm) |
| Driest month | December (8 mm) |
| Mean daily high | 28.0 °C |
| Mean overnight low | 19.3 °C |
Frequently Asked Questions
Where is Dirial Tea Estate located?
Dirial Tea Estate is in Tinsukia, India, at coordinates 27.4022, 95.2776, at an elevation of about 116 metres.
Who operates Dirial Tea Estate?
Dirial Tea Estate is operated by Mcleod Russel India Ltd., according to public supply-chain records.
What type of tea does Dirial Tea Estate produce?
Dirial Tea Estate is recorded as producing black tea.
What certifications does Dirial Tea Estate hold?
Dirial Tea Estate is recorded as holding the following certification(s): Ethical Tea Partnership.
How much rain does Dirial Tea Estate receive?
ERA5 reanalysis data for the estate's coordinates recorded 3,021 mm of precipitation in 2025, peaking in August (592 mm).
How does Dirial Tea Estate compare with estates at a similar elevation?
Dirial Tea Estate recorded 3,021 mm in 2025, 17% more rain than the 2,584 mm average of estates at a similar elevation.
Data sources: public supply-chain disclosures (Ethical Tea Partnership member lists, Rainforest Alliance certificate holders and retailer supplier disclosures); climate figures are ERA5 reanalysis modelled for the estate’s coordinates via Open-Meteo (calendar year 2025); coordinates and elevations from geocoded records. Spotted an error? Email [email protected].
