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Chemical substance more than the environmental standard values was detected by groundwater

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Press release header


December 6, 2019 (Raiwa 1)

The Environment Division atmosphere, the quality of the water charge

ninaitosha靏, Noguchi

Extension number 1872, 1974

Direct 0952-25-7774

E-mail: kankyou@pref.saga.lg.jp

 

Chemical substance more than the environmental standard values was detected by groundwater

 Based on water quality measurement plan of the prefecture of 2019 under the ground, it became clear that nitric acid-related nitrogen of two wells of Higashio, Miyaki-cho district and nitrous acid-related nitrogen exceeded the environment standard value in the quality of the water Surveys of well water which we carried out premeditatedly.

 Therefore, we collect water and carried out inspection again, but will tell about the well water concerned as we exceeded the environmental standard value in the reexamination as follows in one well.

 

Note

1 place

  Higashio, Miyaki-cho, Miyaki-gun district

 

2 test results

(1) Premeditated inspection (September 4, 2019 water intake)

 ・ 26 milligrams per 1 liter of well 1

 ・ 12 milligrams per 1 liter of well 2

(2) Reexamination (October 29, 2019 water intake)

 ・ 23 milligrams per 1 liter of well 1

 ・ 6.2 milligrams per 1 liter of well 2

  ※ It is with 10 milligrams per 1 liter or less of environmental standard (we evaluate with the total of nitric acid-related nitrogen concentration and nitrous acid-related nitrogen concentration.)

Well name

Water intake day

Result of a measurement

[mg/L]

The mean

[mg/L]

Environmental standard value [mg/L]

Well 1

September 4, 2019

26

25

10

October 29, 2019

23

Well 2

September 4, 2019

12

9.1

October 29, 2019

6.2

 

Three prefectures of correspondence

  With the cooperation of present, Miyaki-cho to inhabitants of neighborhood alert.

  In addition, we investigate well in range of about a radius of 500 meters from well which exceeded the environmental standard value.

 

4 causes

  We are investigating now.

 

5 references

(1) Thing about environmental standard of groundwater

   Saga Department of Citizens and Environmental Affairs Environment Division    : 0952-25-7774

   Tosu Public Health and Welfare Office environment safeguard section  : 0942-83-6820

(2) Thing about drinking of well water

   Saga Department of Health and Welfare Hygiene Division  :0952-25-7077

   Tosu Public Health and Welfare Office hygiene countermeasures section  :0942-83-2162

 

[reference]

 ○ About nitric acid-related nitrogen and nitrous acid-related nitrogen

   Nitric acid-related nitrogen and nitrous acid-related nitrogen exist in every place in the soil, water, plant. It is tasteless, and no smell is water-clear and may not notice even if included in drinking water.

 ○ About rise in nitric acid-related nitrogen concentration and nitrous acid-related nitrogen concentration reason

   It is thought that it is caused by use of surplus nitrogenous fertilizer, domestic animal excrement (compost), household wastewater mainly. (nitric acid-related nitrogen is formed as microbe breaks these down and spreads in the atmosphere as gas and is absorbed to plant as nutrition. Of these, thing that was not absorbed penetrates underground and causes rise in density.)

 ○ About influence on health

   When baby consumes water of density level (10 mg/L or more) that exceeds the environmental standard value, and was detected, it is said that we may have methemoglobinemia (anoxia).

 ○ About environmental standard

   We protect a person's health and, as standard that it is desirable to maintain in keeping living environment in good condition, are set in the country.

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Copyright© 2016 Saga Prefecture.All Rights Reserved.

Saga prefectural government office (corporation number 1000020410004)

〒840-8570
1-1-59, Jonai, Saga-shi
Tel: 0952-24-2111 (main)
Copyright© 2016 Saga Prefecture.All Rights Reserved.