After use in production processes, water is sent With the exception of water used to maintain formation pressure, supplement water reuse systems, and a number of other purposes. to treatment facilities. Established levels of wastewater quality are observed as part of in-process environmental monitoring by both in-house laboratories and accredited third-party independent laboratories.

Major measures taken in 2018 to improve wastewater quality at oil and gas extraction entities included the construction of wastewater treatment facilities at the Yareganeft oil and mines division of LLC LUKOIL-Komi (the facility is scheduled to be commissioned in 2019).

In oil-refining, petrochemical, and electrical energy entities in Russia there have in recent years been no discharges of insufficiently treated wastewater into water bodies.

In 2018, the share of insufficiently treated wastewater in the total volume of water removal in the Russian entities of LUKOIL Group remained negligible; in foreign entities, there were no discharges of undertreated water. The weight of dangerous chemicals (Hazard Class 2, mainly lead) in the total volume of wastewaters discharged into bodies of water was 64 kg.

	2016	2017	2018
Wastewater discharged, total, including:	244.0	236.4	214.7
clean in accordance with the standard	223.7	206.2	186.3
treated in accordance with the standard	19.5	29.1	27.5
polluted water	0.7	1.1	0.9

Note. Polluted water is insufficiently treated water and wastewater that is not treated.

	2016	2017	2018
Oil and gas extraction, cubic meters/ton of oil equivalent in hydrocarbon resources	0.005	0.008	0.004
Oil products supply, cubic meters/ton of oil products sold	0.001	0.004	0.003
Transportation, cubic meters/ton of oil products transported	0.002	0.008	0.009

Notes. At oil product supply, petrochemical and electrical energy sector entities, there are no discharges of insufficiently treated waters into bodies of water.