Drinking water laboratory control

The work program for industrial quality control of natural and drinking water at the Park-1 water intake is the main document that officially regulates activities in the field of monitoring the quality of natural water from sources of a centralized water supply system and monitoring the quality of drinking water supplied to the citizens and industrial enterprises located within the boundaries of "Great Stone" China-Belarus industrial park

Industrial laboratory control of drinking water quality by the unitary enterprise "Water Systems of the Industrial Park" provides management of a system of measures to ensure the quality and safety of drinking water supplied to the water network of the park.

The object of industrial laboratory control is water from water supply sources, at the stages of water treatment, at the exit from the stations of the 2nd lift, before entering the distribution network, in the distribution network of the centralized drinking water supply system of the park.

Sanitary protection zones have been organized throughout the Park-1 water intake. The main purpose of creating and ensuring the regime is sanitary protection from pollution of water supply sources and water supply facilities, as well as the territories on which they are located. The first belt (strict regime) includes the territory of the location of the water intake, the sites of all water supply facilities and the water supply channel.
Its purpose is to protect the water intake site and water intake structures from accidental or intentional pollution and damage.
The second and third belts (belts of restrictions) include the territory intended to prevent water pollution from water supply sources. Boundaries of sanitary protection zones for artesian wells are established:

1-st belt of the sanitary protection zone - radius 15.0 m;
2-nd belt of sanitary protection - radius 176.0 m;
3-rd belt of sanitary protection - radius 3253.0 m.

The characteristics of the qualitative composition of the Park-1 water intake aquifer are given in Table 1.

Table 1 - Characteristics of the groundwater quality of "Park-1" water intake ground aquifer.

Name of indicators and components	Content limits		Name of indicators and components
Total hardness, mg / dm3	2,11	4,2	2,3
Oxidability, mgO2 / dm3	0,16	2,5	1,44
Dry residue, mg / dm3	151	252	156
Mineralization, mg / dm3	181	324	203
Free carbon dioxide, mg / dm3	4,4	8,8	4,8
pH	7,27	8,17	7
Na+, mg / dm3	3,0	6,4	4,6
K+, mg / dm3	0,6	1,0	0,8
Ca2+, mg / dm3	27	42,2	29,5
Mg2+, mg / dm3	8,3	11,2	10,2
Fe, mg / dm3	0,05	0,37	0,13
NH4+, mg / dm3	н/обн.	0,1	0,1
NCO3-, mg / dm3	125	12	140
Cl-, mg / dm3	1,2	12	4,0
SO42-, mg / dm3	3,5	11,5	7,4
NO3-, mg / dm3	0,1	8,3	0,58
Mo, mg / dm3	0,005	0,005	0,005
F-,mg / dm3	0,21	0,21	0,21
As, mg / dm3	0,005	0,005	0,005
Zn2+, mg / dm3	0,0019	0,0026	0,0026
Cu2+, mg / dm3	0,0015	0,0016	0,0016
Pb, mg / dm3	0,0003	0,0081	0,0081
Be, mg / dm3	0,0001	0,0002	0,0001
Se, mg / dm3	н/обн.	0,0002	0,0002
Mn2+, mg / dm3	0,05	0,09	0,09
Sr, mg / dm3	0,5	0,5	0,5
Common coliform bacteria	absence	absence	absence
Thermotolerant coliform bacteria	absence	absence	absence

The monitored indicators of drinking water quality and the frequency of monitoring are established in accordance with SanPin 10-124 RB 99: If the water in one of the wells does not comply with the requirements of Sanitary norms and rules 10-124 RB99, the well does not comply with the norms, it must be flushed and disinfected in accordance with the requirements of the Sanitary Norms and Rules "Sanitary and Epidemiological Requirements to the systems of centralized drinking water supply "

Chlorine-containing reagents are used as disinfectants, which have a certificate of state registration of this product (the possibility of using it in household and drinking water supply systems), a chemical safety passport and a quality passport with research of the product for compliance with the declared characteristics.

All headworks of the Park-1 water intake (artesian wells, two reservoirs of clean water) are sanitized at least once a year, after which laboratory tests are carried out on two samples taken sequentially from one point of the headwork. The results of sanitization studies are documented in an act that is valid for 10 days.

Sanitary treatment of water supply networks is carried out in accordance with the requirements of the Sanitary Norms and Rules "Sanitary and Epidemiological Requirements for Centralized Household Drinking Water Supply Systems" with a solution of chlorine-containing reagents that have documents listed above

In the machine room of the pumping station of the 2nd lift, before being fed to the water supply network of the industrial park, water goes through two UV disinfection units.

To carry out production control, sanitary rules, methods and techniques are used in accordance with the activities, approved for use in the Republic of Belarus and included in the scope of laboratory accreditation.

Maximum permissible concentration (MPC) of water quality indicators determined within the framework of the implementation of the Work Program for industrial quality control of natural and drinking water.

Number	Characteristics of the test object (according to the scope of accreditation), units	TNLA for the test object		The standard (MAC) (no more) or the ratio of physiological full value
1.1	Thermotolerant coliform bacteria, number of bacteria per 100 cm3	Sanitary norms and rules 10-124 RB99		absence
1.2	Common coliform bacteria, the number of bacteria per 100 cm3	Sanitary norms and rules 10-124 RB99		absence
1.3	Total microbial count (TMC), the number of bacteria forming colonies in 1 cm3	Sanitary norms and rules 10-124 RB99		no more 50
1.4	Smell, points	Sanitary norms and rules 10-124 RB99		2
1.5	Flavour, points	Sanitary norms and rules 10-124 RB99		2
1.6	Turbidity, mg / dm3	Sanitary norms and rules 10-124 RB99		1,5
1.7	Chromaticity, degrees	Sanitary norms and rules 10-124 RB99		20
1.8	Hydrogen indicator, units pH	Sanitary norms and rules 10-124 RB99		within 6-9
1.9	Total mineralization (dry residue), mg / dm3	Sanitary norms and rules 10-124 RB99		1000
	Total mineralization (dry residue), mg / dm3	Sanitary norms and rules "Requirements for the physiological usefulness of drinking water" approved by act. No. 166 of 10/25/2012		100-1000
1.10	Total hardness, mmol / dm3	Sanitary norms and rules 10-124 RB99		7,0
	Total hardness, mmol / dm3	Sanitary norms and rules "Requirements for the physiological usefulness of drinking water" approved by act. No. 166 of 10/25/2012		1,5-7,0
1.11	Permanganate oxidizability, mg / dm3	Sanitary norms and rules 10-124 RB99		5,0
1.12	Phenolic index, mg / dm3	Sanitary norms and rules 10-124 RB99		0,25
1.13	Aluminum (A13+), mg / dm3	Sanitary norms and rules 10-124 RB99		0,5
1.14	Ammonia (nitrogen), mg / dm3	Sanitary norms and rules 10-124 RB99		2,0
1.15	Barium (Ва2+), mg / dm3	Sanitary norms and rules 10-124 RB99		0,1
1.16	Iron (Fe, in total), mg / dm3	Sanitary norms and rules 10-124 RB99		0,3
1.17	Manganese (Мn, in total), mg / dm3	Sanitary norms and rules 10-124 RB99		0,1
1.18	Copper (Сu, in total), mg / dm3	Sanitary norms and rules 10-124 RB99		1,0
1.19	Arsenic (As, in total), mg / dm3	Sanitary norms and rules 10-124 RB99		0,05
1.20	Nickel (Ni, in total), mg / dm3	Sanitary norms and rules 10-124 RB99		0,1
1.21	Nitrates (by NO3-), mg / dm3	Sanitary norms and rules 10-124 RB99		45
1.22	Nitrates, mg / dm3	Sanitary norms and rules 10-124 RB99		3,0
1.23	Lead (РЬ, in total), mg / dm3	Sanitary norms and rules 10-124 RB99		0,03
1.24	Sulfates (SO42-), mg / dm3	Sanitary norms and rules 10-124 RB99		500
1.25	Fluorides (F-), mg / dm3	Sanitary norms and rules 10-124 RB99		1,5
1.26	Chlorides (Сl-), mg / dm3	Sanitary norms and rules 10-124 RB99		350
1.27	Chromium (Cr6+), mg / dm3	Sanitary norms and rules 10-124 RB99		0,05
1.28	Zinc (Zn2+), mg / dm3	Sanitary norms and rules 10-124 RB99		5,0
1.29	DDT (sum of isomers), mg / dm3	Sanitary norms and rules 10-124 RB99		0,002
1.30	Calcium (Ca), mg / dm3	Sanitary norms and rules "Requirements for the physiological usefulness of drinking water" approved by act. No. 166 of 10/25/2012		25-130
1.31	Magnesium (Mg), mg / dm3			5-65
1.32	Potassium (K), mg / dm3			2-20
1.33	Bicarbonates (НСО3-), mg / dm3			30-400