GROUNDWATER SURFACE WATER MCL MCLG or MAJOR SOURCES IN DRINKING WATER AVERAGE RANGE AVERAGE RANGE PHG (a)
ORGANIC CHEMICALS
INORGANIC CHEMICALS ( b )
ND N/A 118 ND-240 1,000 600 Erosion of natural deposits; residue from surface water treatment processes 110 N/A ND ND-111 1,000 2,000 Oil drilling waste and metal refinery discharge; erosion of natural deposits
0.22 N/A 0.7 0.60-0.90 2 1 Erosion of natural deposits, water additive that promotes strong teeth RADIOLOGICAL ( c )
ND N/A ND ND-3 15 0 Erosion of natural deposits
NS NS ND ND- 6 50 0 Decay of natural and man-made deposits ND N/A ND ND-1 0.019 Erosion of natural deposits
ND N/A 1.3 ND-3 20 0.43 Erosion of natural deposits
4.0 4.0 Drinking water disinfectant added for treatment MCL MCLG or
PHG (a) MAJOR SOURCES IN DRINKING WATER
80 - By-product of drinking water disinfection
60 - By-product of drinking water disinfection
10 0.1 By-product of drinking water disinfection
2 1 Runoff and leaching from natural deposits; water additive that promotes strong teeth; discharge from fertilizer and aluminum factories
DISTRIBUTION SYSTEM
MCL
(STATE/FEDERAL)
MCLG or
PHG (a) MAJOR SOURCES IN DRINKING WATER
DISTRIBUTION SYSTEM MAJOR SOURCES IN DRINKING WATER
DISTRIBUTION SYSTEM MCLG or
PHG
(a)
Your tap water met all U.S. EPA and State primary drinking water health standards last year.
Only detected results are shown, and are from the most recent testing performed in accordance with state and federal drinking water regulations.
None
None
Fluoride (mg/L)
Fluoride (mg/L) ( f )
Bromate (µg/L) ( f )
Haloacetic Acids (µg/L)
Trihalomethanes-TTHMS (µg/L)
ND-9.8
0.7 0.4-0.9
MANHATTAN BEACH 2021 ANNUAL WATER QUALITY REPORT
This report is a snapshot of last year’s water quality. We included details about where your water comes from, what it contains, and how it compares to State standards. We are committed to providing you with information because informed customers are our best allies.
HIGHEST % POSITIVE
IN A MONTH RANGE % POSITIVE
SUBSTANCES MONITORED FOR PUBLIC HEALTH
Barium (µg/L)
Gross Alpha (pCi/L)
Gross Beta (pCi/L)
Radium 228 (pCi/L)
Uranium (pCi/L)
Aluminum (µg/L)
MRDLGMRDL
1.8 0.6 - 2.8
HIGHEST LRAA RANGE OF RESULTS
50 26-40
14 6.1-14
AVERAGE RANGE
4.5 MCL MAJOR SOURCES IN DRINKING WATER
MICROBIALS ( d )
DISINFECTION RESIDUAL
INORGANICS
AVERAGE RANGE
DISINFECTION
BYPRODUCTS ( e )
Chlorine/chloramine Residual
(mg/L as CL2)
ND-0.64 0 1.3 AL 0.3 Internal corrosion of household plumbing, erosion of natural deposits ND-43 1 15 AL 0.2 Internal corrosion of household plumbing, industrial manufacturer discharges
AVERAGE RANGE AVERAGE RANGE
ND N/A 118 ND-240 200 600 Erosion of natural deposits, surface water treatment process residue 240 N/A 88 65-97 500 - Runoff/leaching from natural deposits, seawater influence 5 N/A 1.3 1-2 15 - Naturally-occurring organic materials 1600 N/A 827 519-965 1,600 - Substances that form ions when in water, seawater influence
0.06 N/A ND ND 0.5 - Municipal and industrial waste discharges 140 N/A ND ND 300 - Leaching from natural deposits, industrial wastes 57 N/A ND ND 50, NL = 500 - Leaching from natural deposits ND N/A 1 1-2 3 - Naturally-occurring organic materials 190 N/A 166 61-221 500 - Runoff/leaching from natural deposits, industrial wastes 940 N/A 500 298-609 1,000 - Runoff/leaching from natural deposits
0.30 N/A ND ND 5 - Soil runoff
5 - Soil runoff
AVERAGE RANGE AVERAGE RANGE
200 N/A 114 86-128 -
117 N/A 54 27-70 -
39 N/A 21 12-26 -
10 N/A 3.9 2.6-4.7 -
130 N/A 85 61-101 -
452 N/A 223 110-276 -
AVERAGE RANGE AVERAGE RANGE
NS NS 147 130-180 1,000
NS NS 67 55-88 800
NS NS ND ND-2.6 10
GROUNDWATER SURFACE WATER Notification
AVERAGE RANGE AVERAGE RANGE Level or PHG (a )
0.37 N/A 0.51 0.35-0.61 -
7.5 N/A 8.2 8.1-8.4 -
DISTRIBUTION SYSTEM MCLG or
PHG (a)RANGE
GROUNDWATER SURFACE WATER MCLG or
P
HG (a)
DISTRIBUTION SYSTEM MCLG or
P
HG (a)
GROUNDWATER SURFACE WATER Notification Level or
PHG (a)
GROUNDWATER SURFACE WATER Notification Level or
PHG (a)
Aluminum (µg/L) ( i )
Lead (µg/L)
Copper (mg/L)
Manganese (µg/L) ( j )
Iron (µg/L)
Foaming Agents (mg/L)
Conductivity (umhos/cm)
MAJOR SOURCES IN DRINKING WATER
Runoff/leaching from natural deposits; industrial wastes Byproduct of drinking water chlorination; industrial processes Byproduct of drinking water chloramination; industrial processes Sulfate (mg/L)
Magnesium (mg/L)
Calcium (mg/L)
Alkalinity (as CaCO ) (mg/L)
Turbidity (NTU)
Odor (threshold odor number)
Turbidity (NTU)
Total Dissolved Solids (mg/L)
Color (color units)
Chloride (mg/L)
0.57 0.30-1.0
OTHER PARAMETERS
Salt present in the water; naturally-occurring
Runoff/leaching of natural deposits; sum of polyvalent cations, generally magnesium and calcium present in the water
MAJOR SOURCES IN DRINKING WATER
Total Hardness (mg/L)
Sodium (mg/L)
Runoff/leaching of natural deposits; carbonate, bicarbonate, hydroxide, and occasionally borate, silicate, and phosphate
Runoff/leaching of natural deposits
Runoff/leaching of natural deposits
Salt present in the water; naturally-occurring
ND ( g )
0.26 ( g )
MAJOR SOURCES IN DRINKING WATER
MCL
AL MAJOR SOURCES IN DRINKING WATER
MAJOR SOURCES IN DRINKING WATER
( h )
MAJOR SOURCES IN DRINKING WATER
Corrosivity (as saturation index) ( k )
N-Nitrosodimethylamine (ng/L)
Chlorate (µg/L)
Boron (µg/L)
LEAD AND COPPER AT
THE TAP
CONSTITUENT ( b )
CONSTITUENT
CONSTITUENT ( b )
GENERAL MINERALS
MCL
Potassium (mg/L)
AVERAGE RANGE
90TH PERCENTILE
SECONDARY STANDARDS MONITORED AT THE SOURCE FOR AESTHETIC PURPOSES
SUBSTANCES MONITORED IN THE DISTRIBUTION SYSTEM FOR AESTHETIC PURPOSES
SUBSTANCES WITH
NOTIFICATION LEVELS
MISCELLANEOUS
pH (standard unit)
Natural/industrially-influenced balance of hydrogen/carbon/oxygen in water
ABBREVIATIONS
( j ) Manganese exceeded the secondary MCL in one well in 2021. Water from this well is blended with imported surface water in the distribution system to reduce concentrations. The secondary MCL is set to protect against unpleasant effects such as color, taste, odor, and staining of laundry and plumbing fixtures. A manganese secondary MCL exceedance does not pose a health risk. ( k ) Positive SI= non-corrosive; tendency to precipitate and/or deposit scale on pipes. Negative SI= corrosive; tendency to dissolve calcium carbonate (taken at 20⁰ C) Reference:Standard Methods (SM2330) umhos/cm = Micromhos per centimeter
pCi/L = picoCuries per Liter
NTU = Nephelometric Turbidity Units
ng/L = Nanograms per Liter or parts per trillion
(equivalent to 1 drop in 42,000,000 gallons)
µg/L = Micrograms per Liter or parts per billion
(equivalent to 1 drop in 42,000 gallons)
mg/L = Milligrams per Liter or parts per million
(equivalent to 1 drop in 42 gallons)
NS = Not Sampled during this reporting period( d ) This report reflects changes in drinking water regulatory requirements during 2021. These revisions add the requirements of the federal Revised Total Coliform Rule (effective since April 1, 2016) to the existing state Total Coliform Rule. The revised rule maintains the purpose to protect public health by ensuring the integrity of the drinking water distribution system and monitoring for the presence of microbials (i.e., total coliform and E. coli bacteria). The U.S. EPA anticipates greater public health protection as the rule requires water systems that are vulnerable to microbial contamination to identify and fix problems. Water systems that exceed a specified frequency of total coliform occurrences are required to conduct an assessment to determine if any sanitary defects exist. If found, these must be corrected by the water system. The state Revised Total Coliform Rule became effective July 1, 2021.
N/A = Not Applicable (e.g. range of results where a single sample was taken) ( b ) The State allows monitoring some contaminants less than once per year because the concentrations do not vary frequently. This data is from the most recent monitoring (2019-2021).
ND = Not Detected at the reporting limit
Treatment Technique (TT) : A required process intended to reduce the level of a contaminant in drinking water.
Regulatory Action Level (AL) : The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
Primary Drinking Water Standard (PDWS) : MCLs and MRDLs for contaminants that affect health along with their monitoring and reporting requirements, and water treatment requirements.
Maximum Contaminant Level (MCL): The highest level of a contaminant that is allowed in drinking water set by the State and the Environmental Protection Agency (EPA). Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible. Secondary MCLs are set to protect odor, taste, and appearance of drinking water. MCLs are based on the most stringent value between State and EPA MCLs. A contaminant with no MCL but requires compliance with other drinking water regulations is designated either as Treatment Technique (TT), Action Level (AL), or Notification Level (NL).
Maximum Contaminant Level Goal (MCLG): The level of a contaminant in drinking water below which there is no known or expected health risk. MCLGs are set by the U.S.EPA.
Notification Level (NL): Notification levels are health-based advisory levels established by the Division of Drinking Water (DDW) for chemicals in drinking water that lack maximum contaminant levels (MCLs). When chemicals are found at concentrations greater than their notification levels, certain requirements and recommendations apply. The level at which DDW recommends removal of a drinking water source from service is called the "response level." ( a ) Advisory Levels include: California PHGs and NLs; and Federal MCLGs and MRDLGs. ( e ) LRAA is used to calculate averages, ranges, and State and Federal MCL compliance.
DEFINITIONS
FOOTNOTES
( i ) Constituent has primary standard/action level and secondary standard ( h ) There were 7 schools in the service area that requested lead testing (2019). ( g ) 90th percentile from the most recent sampling at selected customer taps (40 samples in 2019) Public Health Goal (PHG) : The level of a contaminant in drinking water below which there is no known or expected risk to health. PHGs are set by the California Environmental Protection Agency.
Maximum Residual Disinfectant Level Goal (MRDLG): The level of a disinfectant added for water treatment below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
Maximum Residual Disinfectant Level (MRDL): The highest level of a disinfectant added allowed in drinking water. There is strong evidence that disinfectant additions are necessary for microbial control.
Location Running Annual Average (LRAA) : Locational Running Annual Averages are calculated as an average of all samples collected within a 12-month period at a single site. ( c ) The most current results for radiological data cover samples from 2015-2018. ( f ) Data are taken from imported water at MWD's treatment plant effluents.