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Guidelines for drinking-water quality: Fourth edition incorporating the first and second addenda [Internet]. Geneva: World Health Organization; 2022.

Cover of Guidelines for drinking-water quality

Guidelines for drinking-water quality: Fourth edition incorporating the first and second addenda [Internet].

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Abbreviations used in text

2,4-D

2,4-dichlorophenoxyacetic acid

2,4-DB

2,4-dichlorophenoxybutyric acid

2,4-DP

dichlorprop

2,4,5-T

2,4,5-trichlorophenoxyacetic acid

2,4,5-TP

2,4,5-trichlorophenoxy propionic acid; fenoprop

AAS

atomic absorption spectrometry

Absor

absorptiometry

ADI

acceptable daily intake

AES

atomic emission spectrometry

AIDS

acquired immunodeficiency syndrome

AMPA

aminomethylphosphonic acid

ARfD

acute reference dose

ATX

anatoxin

BDCM

bromodichloromethane

BMD

benchmark dose

BMDL

lower confidence limit on the benchmark dose

BMDLx

lower 95% confidence limit on the benchmark dose for an x% response

BTEX

benzene, toluene, ethylbenzene and xylenes

Bti

Bacillus thuringiensis israelensis

bw

body weight

CAS

Chemical Abstracts Service

Col

colorimetry

CPVC

chlorinated polyvinyl chloride

CSAF

chemical-specific adjustment factor

Ct

product of disinfectant concentration and contact time

CYN

cylindrospermopsin

DAEC

diffusely adherent E. coli

DALY

disability-adjusted life year

DBCM

dibromochloromethane

DBCP

1,2-dibromo-3-chloropropane

DBP

disinfection by-product

DCA

dichloroacetic acid

DCB

dichlorobenzene

DCP

dichloropropane

DDT

dichlorodiphenyltrichloroethane

DEHA

di(2-ethylhexyl)adipate

DEHP

di(2-ethylhexyl)phthalate

DNA

deoxyribonucleic acid

DPD

N,N-diethyl-1,4-phenylenediamine sulfate

EAAS

electrothermal atomic absorption spectrometry

EAEC

enteroaggregative E. coli

ECD

electron capture detector

EDTA

ethylenediaminetetraacetic acid; edetic acid

EHEC

enterohaemorrhagic E. coli

EIEC

enteroinvasive E. coli

ELISA

enzyme-linked immunosorbent assay

EPEC

enteropathogenic E. coli

ETEC

enterotoxigenic E. coli

F0

parental generation

F1

first filial generation

FAAS

flame atomic absorption spectrometry

FAO

Food and Agriculture Organization of the United Nations

FD

fluorescence detector

FID

flame ionization detector

FPD

flame photodiode detector

GAC

granular activated carbon

GC

gas chromatography

GL

guidance level (used for radionuclides in drinking-water)

GV

guideline value

HAA

haloacetic acid

HAV

hepatitis A virus

HCB

hexachlorobenzene

HCBD

hexachlorobutadiene

HCH

hexachlorocyclohexane

HEV

hepatitis E virus

HIV

human immunodeficiency virus

HPC

heterotrophic plate count

HPLC

high-performance liquid chromatography

IARC

International Agency for Research on Cancer

IC

ion chromatography

ICP

inductively coupled plasma

ICRP

International Commission on Radiological Protection

IDC

individual dose criterion

IPCS

International Programme on Chemical Safety

IQ

intelligence quotient

ISO

International Organization for Standardization

JECFA

Joint FAO/WHO Expert Committee on Food Additives

JMPR

Joint FAO/WHO Meeting on Pesticide Residues

LC

liquid chromatography

LOAEL

lowest-observed-adverse-effect level

LRV

log10 reduction value

MC

microcystin

MCB

monochlorobenzene

MCPA

4-(2-methyl-4-chlorophenoxy)acetic acid

MCPB

2,4-MCPB; 4-(4-chloro-o-tolyloxy)butyric acid; 4-(4-chloro-2-methylphenoxy)butanoic acid

MCPP

2(2-methyl-chlorophenoxy) propionic acid; mecoprop

MDL

method detection limit

MMT

methylcyclopentadienyl manganese tricarbonyl

MS

mass spectrometry

MS/MS

tandem mass spectrometry

MTBE

methyl tertiary-butyl ether

MX

3-chloro-4-dichloromethyl-5-hydroxy-2(5H)-furanone

NDMA

N-nitrosodimethylamine

NOAEL

no-observed-adverse-effect level

NOEL

no-observed-effect level

NTA

nitrilotriacetic acid

NTP

National Toxicology Program (USA)

NTU

nephelometric turbidity unit

PAC

powdered activated carbon

PAH

polynuclear aromatic hydrocarbon

PCE

tetrachloroethene

PCP

pentachlorophenol

PCR

polymerase chain reaction

PD

photoionization detector

PDA

photodiode array

PMTDI

provisional maximum tolerable daily intake

PPA

protein phosphatase assay

PT

purge and trap

PTDI

provisional tolerable daily intake

PTMI

provisional tolerable monthly intake

PTWI

provisional tolerable weekly intake

PVC

polyvinyl chloride

QMRA

quantitative microbial risk assessment

RNA

ribonucleic acid

SI

Système international d’unités (International System of Units)

SODIS

solar water disinfection

STX

saxitoxin

sp.

species (singular)

spp.

species (plural)

subsp.

subspecies (singular)

TBA

terbuthylazine

TCB

trichlorobenzene

TCE

trichloroethene

TCU

true colour unit

TD05

tumorigenic dose05, the dose associated with a 5% excess incidence of tumours in experimental animal studies

TDI

tolerable daily intake

TDS

total dissolved solids

THM

trihalomethane

TID

thermal ionization detector; total indicative dose

UF

uncertainty factor

UN

United Nations

UNICEF

United Nations Children’s Fund

UNSCEAR

United Nations Scientific Committee on the Effects of Atomic Radiation

USA

United States of America

UV

ultraviolet

UVPAD

ultraviolet photodiode array detector

WHO

World Health Organization

WHOPES

World Health Organization Pesticide Evaluation Scheme

WSP

water safety plan

YLD

years of healthy life lost in states of less than full health (i.e. years lived with a disability)

YLL

years of life lost by premature mortality

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