Consumer Confidence ReportContaminants Highest No. of
Detections MCLG
Total Coliform Bacteria 0 0
Fecal Coliform Bacteria of E. Coli 0 0
Contaminants
(CCR UNITS)No. of Samples --No. of Sites
Exceeding RAL RAL PHG
Lead (ppb)22 0 15 0.2
Copper (ppm)22 0 1.3 0.3
Contaminants
(CCR UNITS)No. of Samples --No. of Sites
Exceeding RAL RAL PHG
Lead (ppb)10 0 15 0.2
PRIMARY DRINKING WATER STANDARDS WELL #5 WELL #23
PRIMARY CONTAMINANT MCL MCLG
PHG RANGE RANGE
Arsenic (ppb)10 0.004 4 3
Chromium (total) (ppb)50 100 ug/l 10 10 Erosion of natural deposits
Nitrate (as N) (ppm)10 10 0.4 1.6
Nitrite (as N) (ppm)1 1 0.4 0
Fluoride (ppm)2 1 0.10 0.2
MTBE (ug/l)13 13 3.00 0
Gross Alpha Particle Activity (pCi/I)15 NA 6.63 10.1
Uranium (pCi/I)20 0.43 2.15 4.38
WELL #5 WELL #23
SECONDARY CONTAMINANT RANGE RANGE
Chloride (ppm)125 45
Iron (ppb)110 100
Manganese (ppb)30 20
Sulfate (as SO4) (ppm)170 167
Total Dissolved Solids (ppm)900 650
Zinc (ppb)50 50
WELL #5 WELL #23
CONTAMINANT RANGE RANGE
Total Alkalinity as CaCO3 (ppm)430 390
Calcium (ppm)125 103
Sodium (ppm)56 50
Magnesium (ppm)55 47
WELL #5 WELL #23
Aggressive Index 12.3 12.7
Specific Conductance (micromhos)1320 1090
Total Hardness (ppm) (as CaCO3)538 450
pH (units)7.3(g)7.8
Turbidity (NTU)*****0.9(g)0.5
MCL MRDL RANGE
80 NA 26-65
60 NA 20-39
4.0 4.0 1.1-2.18
UNREGULATED CHEMICALS Avg. Level
Detected MCL
Boron (ppm)0.2 NS
Vanadium (ppb)3 NS
Table #1 DISTRIBUTION SYSTEM WATER SAMPLING RESULTS SHOWING DETECTION OF COLIFORM BACTERIA
Table #2 - 2020 HOME SAMPLING RESULTS SHOWING THE DETECTION OF LEAD AND COPPER
Table #4 - GROUND WATER SAMPLING TEST RESULTS FOR DETECTION OF CONTAMINANTS
No. of Months in Violation
0
0
90th Percentile Level
Detected
ND
0.238
Internal corrosion of household plumbing system; discharges from industrial manufacturers;
erosion of natural deposits
Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from
wood preservatives
Typical Source of Contaminant
MCL
More than 1 positive monthly sample
A routine sample and a repeat sample are total Coliform
positive, and one is also fecal Coliform or E. Coli
Typical Source of Contaminant
Erosion of natural deposits
Erosion of natural deposits
Naturally present in the environment
Human and animal fecal waste
POTENTIAL CONTAMINANTION SOURCE
Erosion of natural deposits
Erosion of natural deposits; water additive that promotes strong teeth; discharge from fertilizer and aluminum factories
Runoff and leaching from fertilizer use; leaching from septic tanks and sewage; erosion of natural deposits
Table #3 - 2017 LEAD SAMPLING RESULTS FOR SCHOOLS K-12 (2 SCHOOLS TESTED)
90th Percentile Level
Detected Typical Source of Contaminant
3.5 Internal corrosion of household plumbing system; discharges from industrial manufacturers;
erosion of natural deposits
Runoff and leaching from fertilizer use; leaching from septic tanks and sewage; erosion of natural deposits
gasoline additive methyl tertiary butyl ether
Runoff; leaching from natural deposits; seawater
Natural or industrial
Natural or industrial
MCL
500
300
50
POTENTIAL CONTAMINANTION SOURCE
By-product of drinking water chlorination
By-product of drinking water chlorination
Disinfectant
DISTRIBUTION SYSTEM
***** Turbidity is a measure of the cloudiness of the water. The City monitors this because it is a good indicator of water quality. High turbidity can hinder the effectiveness of disinfectants.
DISINFECTANT RESIDUAL AND BY-PRODUCTS
Total Trihalomethanes (ppb)
Total Haloacetic Acids (ppb)
100
50
Naturally-occurring; element found in soil and water in the form of boric acid and sodium
tetraborate
Naturally-occurring; has been found in association with hazardous waste sites
Typical Source of ContaminantsRALRange of Detections Low-
High
Table #5 - WELL SAMPLING RESULTS SHOWING DETECTION OF UNREGULATED CHEMICALS
ND-.21
NA
NA
NA
NA
N/A
Chlorine Residual
Runoff; leaching from natural deposits; seawater
Runoff; leaching from natural deposits; seawater
Runoff; leaching from natural deposits; seawater
Runoff; leaching from natural deposits; seawater
NA
Substances that form ions when in water; seawater influence
Generally found in ground and surface water
NA
Soil runoff; leaching from natural deposits
ADDITIONAL ANALYSIS
MCL=5
2021 WATER QUALITY DATA FOR PISMO BEACH
NA
MCL=1600
NA
NA
Runoff; leaching from natural from natural deposits; industrial
Soil runoff; leaching from natural deposits
Improper waste disposal
POTENTIAL CONTAMINANTION SOURCE
WITHOUT A DRINKING WATER STANDARDS
500
1000
5000
MCL
SECONDARY DRINKING WATER STANDARDS
(g) Laboratory sample (h) Well #23 not in service for 2019 (I) not sampled in reporting year
Maximum Contaminant Level
(MCL)
Regulatory Action Level (RAL)
Maximum Contaminant Level
Goal (MCLG and Public Health
Goal (PHG)
Maximum Residual Disinfectant
Level (MRDL)
Maximum Residual Disinfectant
Level Goal (MRDLG)
Primary Drinking Water
Standards (PDWS)
Primary Drinking Water
Standards (SDWS)
Treatment Technique (TT)
Regulatory Notification Level
(NL)
Running Annual Average (RAA)
Not Collected (NC)
Not Reported (NR)
Not Standard (NS)
Not Detected (ND)
Not Analyzed (NA)
WAIVED
pCi/L
ppm
ppb
uS/cm
CU
NS
CFU/ml
NTU
TON
USEPA
CDC
LI
LopezWTP
CCWA
PPWTP
TOC
The concentration of a contaminant that, if exceeded, triggers treatment of other requirement which a water system must follow
A required process intended to reduce the level of a contaminant in drinking water
State and Lopez Water Footnotes:
LANGELIER INDEX; NONCORROSIVE = ANY POSITIVE VALUE, CORROSIVE = ANY NEGATIVE VALUE
NO STANDARD
COLONY FORMING UNITS PER MILLILITER
NEPHELOMETRIC TURBIDITY UNIT
MCLs for contaminants that affect health along with their monitoring and reporting requirements, and water treatment requirements. Primary MCLs are set as close
to the PHGs (or MCLGs) as is economically and technologically feasible
MCLs for contaminants to protect the taste, odor, or appearance of the drinking water. Contaminants with SDWSs do not affect health at the MCL levels
The level of a disinfectant added for water treatment below which there is no known or expected risk to health. MRDLGs are set by the U.S. Environmental Protection
Agency
A sample was not collected for this contaminant
Contaminant was not reported
Contaminant is not detectable at testing limit
Contaminant for which there is no established MCL
Contaminant was not analyzed
FOR THE WEB BROWSERS: www.pismobeach.org www.thinkh2onow.com
The highest level of contaminant that is allowed in drinking water
The level of contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the United States Environmental Protection
Agency and PHGs are set by the California Environmental Protection Agency
The level of a disinfectant added for water treatment that may not be exceeded at the consumer's faucet
• County Board of Supervisors http://slocounty.ca.gov/bos.html
• The Office of Ground Water and Drinking at EPA
• www.water.epa.gov/drink/index.cfm
• American Water Works Association http://www.awwa.org
The concentration of a contaminat that, if exceeded, triggers treatement or other requirements that a water system must follow
In order to ensure that tap water is safe to drink, EPA, and the California State Water Reserouces Control Board, prescribes regulations which limit the amount of certain contaminants in water
provided by public water systems. Food and Drug Administration (FDA) regulations establish limits for contaminants in bottled water which must provide the same protection for public health.
Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence does not necessarily indicate that water poses a health risk.
On September 4, 2007, the CDPH granted the TOC waiver to the Lopez WTP. The facility upgraded to Membrane Treatment
PICOCURIES PER LITER (A MEASURE OF RADIOACTIVITY)
PARTS PER MILLION, OR MILLIGRAMS PER LITER (MG/L)
PARTS PER BILLION, OR MICROGRAMS PER LITER (G/L)
MICROMHOS PER CENTIMETER (UNIT OF SPECIFIC CONDUCTANCE OF WATER)
THRESHOLD ODOR NUMBER
UNITED STATES ENVIORNMENTAL PROTECTION AGENCY
CENTER FOR DISEASE CONTROL HOTLINE (1-800-426-4791)
More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency's State Drinking Water Hotline (1-800-416-4791). Some
people may be more vulnerable to contaminants in drinking water then the general population. Immune-compromised persons such as persons with cancer undergoing chemotherapy, persons
who have undergone organ transplant, people with HIV/AIDS or other immune system deficiencies, some elderly, and infants can be particularly at risk of infections. These people should seek
advice about drinking water from their health care providers.
If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components
associated with service lines and home plumbing. The City of Pismo beach is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing
components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using water for
drinking or cooking. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead drinking water testing methods, and steps you can take to
minimize exposure is available from the Safe Drinking Water Hotline or at http://www.epa.gov//lead.
(a) Distribution system samples. (b) Aluminum has a Secondary MCL of 0.2 ppm
(e) The MRDL for chlorine is based on a running annual average of distribution system samples. (f) Increases in odor have been associated with algae blooms. During times of increased
algae blooms an odor in the algae is controlled with algaecides and the odor is reduced to acceptable levels by treating water with powder activated carbon.
(c) Compliance based on the running annual average of samples computed quarterly. (d) TOCs are taken at the treatment plant's combined filter effluent.
LOPEZ WATER TREATMENT PLANT
CENTRAL COAST WATER AUTHORITY
POLANIO PASS WATER TREATMENT PLANT
TOTAL ORGANIC CARBON
USEPA/CDC Provides guidelines on appropriate means to the risk of infection by Cryptosporidium
and other microbial contaminants, for information call - Safe Drinking Water Hotline (1-800-426-
4791).
This hotline operates from 9 a.m. to 5 p.m. EST, Monday through Friday.
For more information contact:
COLOR UNITS
An arithmetic average of all sample is computed quarterly. The quarterly average is then averaged against the previous three quarters worth of data to provide an
annual running average. The highest running average over a twelve month period used for compliance
You can provide input regarding water quality
decisions in your area.
•The drinking water source assessment and protection program was completed in September
2002, both are on file at the Water Division.
•The public can address concerns to the Public Works Water Division. Contact Brandon Shea at
(805) 773-7054
•The City Council meets the first and third Tuesday of each month at City Hall.
•Este informe contiene informacion muy importante sobre la calidad del agua que usted consume. Por favor
de traducirlo, o hable con alguien que lo entiende bien.