Lenntech <!-- PLUGIN:LANGUAGE:water_treatment_and_purification --> Lenntech <!-- PLUGIN:LANGUAGE:water_treatment_and_purification -->

WHO/EU drinking water standards comparative table

The EU standards are more recent (1998), complete and strict than the WHO standards (1993).

Some examples are:

- Bromate (Br): Not mentioned by the WHO, 0.01 mg/l guideline in the EU standards.

- Manganese (Mn): Guideline reduced from 0.5 to 0.05 mg/l.

- Cyanide (CN): Guideline reduced from 0.07 to 0.005 mg/l.

But in some cases the EU guidelines are less strict than the WHO’s:

- Cadmium (Cd): Guideline rised from 0.003 to 0.005 mg/l.

Here is a comparative table of both WHO and EU standards:

WHO standards

EU standards

1993

1998

Suspended solids

No guideline

Not mentioned

COD

No guideline

Not mentioned

BOD

No guideline

Not mentioned

Oxidisability

5.0 mg/l O2

Grease/oil

No guideline

Not mentioned

Turbidity

No guideline(1)

Not mentioned

pH

No guideline(2)

Not mentioned

Conductivity

250 microS/cm

250 microS/cm

Color

No guideline(3)

Not mentioned

Dissolved oxygen

No guideline(4)

Not mentioned

Hardness

No guideline(5)

Not mentioned

TDS

No guideline

Not mentioned

cations

(positive ions)

Aluminium (Al)

0.2 mg/l

0.2 mg/l

Ammonia (NH4)

No guideline

0.50 mg/l

Antimony (Sb)

0.005 mg/l

0.005 mg/l

Arsenic (As)

0.01 mg/l

0.01 mg/l

Barium (Ba)

0.3 mg/l

Not mentioned

Berillium (Be)

No guideline

Not mentioned

Boron (B)

0.3 mg/l

1.00 mg/l

Bromate (Br)

Not mentioned

0.01 mg/l

Cadmium (Cd)

0.003 mg/l

0.005 mg/l

Chromium (Cr)

0.05 mg/l

0.05 mg/l

Copper (Cu)

2 mg/l

2.0 mg/l

Iron (Fe)

No guideline(6)

0.2

Lead (Pb)

0.01 mg/l

0.01 mg/l

Manganese (Mn)

0.5 mg/l

0.05 mg/l

Mercury (Hg)

0.001 mg/l

0.001 mg/l

Molibdenum (Mo)

0.07 mg/l

Not mentioned

Nickel (Ni)

0.02 mg/l

0.02 mg/l

Nitrogen (total N)

50 mg/l

Not mentioned

Selenium (Se)

0.01 mg/l

0.01 mg/l

Silver (Ag)

No guideline

Not mentioned

Sodium (Na)

200 mg/l

200 mg/l

Tin (Sn) inorganic

No guideline

Not mentioned

Uranium (U)

1.4 mg/l

Not mentioned

Zinc (Zn)

3 mg/l

Not mentioned

anions

(negative ions)

Chloride (Cl)

250 mg/l

250 mg/l

Cyanide (CN)

0.07 mg/l

0.05 mg/l

Fluoride (F)

1.5 mg/l

1.5 mg/l

Sulfate (SO4)

500 mg/l

250 mg/l

Nitrate (NO3)

(See Nitrogen)

50 mg/l

Nitrite (NO2)

(See Nitrogen)

0.50 mg/l

microbiological

parameters

Escherichia coli Not mentioned 0 in 250 ml

Enterococci

Not mentioned

0 in 250 ml

Pseudomonas

aeruginosa

Not mentioned

0 in 250 ml

Clostridium

perfringens

Not mentioned

0 in 100 ml

Coliform bacteria

Not mentioned

0 in 100 ml

Colony count 22oC

Not mentioned

100/ml

Colony count 37oC

Not mentioned

20/ml

other parameters

Acrylamide

Not mentioned

0.0001 mg/l

Benzene (C6H6)

Not mentioned

0.001 mg/l

Benzo(a)pyrene

Not mentioned

0.00001 mg/l

Chlorine dioxide (ClO2)

0.4 mg/l

1,2-dichloroethane

Not mentioned

0.003 mg/l

Epichlorohydrin

Not mentioned

0.0001 mg/l

Pesticides

Not mentioned

0.0001 mg/l

Pesticides - Total

Not mentioned

0.0005 mg/l

PAHs

Not mentioned

0.0001 mg/l

Tetrachloroethene

Not mentioned

0.01 mg/l

Trichloroethene

Not mentioned

0.01 mg/l

Trihalomethanes

Not mentioned

0.1 mg/l

Tritium (H3)

Not mentioned

100 Bq/l

Vinyl chloride

Not mentioned

0.0005 mg/l

(1) Desirable: Less than 5 NTU
(2) Desirable: 6.5-8.5
(3) Desirable: 15 mg/l Pt-Co
(4) Desirable: less than 75% of the saturation concentration
(5) Desirable: 150-500 mg/l
(6) Desirable: 0.3 mg/l



General information on the drinking water standards

About Lenntech

Lenntech BV
Rotterdamseweg 402 M
2629 HH Delft

tel: +31 152 610 900
fax: +31 152 616 289
e-mail: info@lenntech.com


Copyright © 1998-2017 Lenntech B.V. All rights reserved