2024 Consumer Confidence Report

Water System
Information

Water System Name: APPLE VALLEY HEIGHTS COUNTY
WATER DISTRICT

Report Date: JUNE 30, 2025

Type of Water Source(s) in Use: GROUNDWATER
WELLS NO. 3 & 4

Name and General
Location of Source(s): WELLS NO. 3 & 4 ARE LOCATED IN THE MOJAVE
ADJUSDICATED BASIN ALTO.  NORTH OF THE
SAN BERNARDINO MOUNTAINS, IN THE SOUTHERN UNICORPORATED AREA OF THE TOWN OF
APPLE VALLEY.

Drinking Water Source
Assessment Information: SOURCE WATER ASSESSMENTS WERE CONDUCTED ON NOVEMBER 7,
2025. THE SOURCE WATER PROTECTION PLAN CAN BE FOUND ON THE DISTRICT WEBSITE HTTPS://AVHWATER.ORG/SOURCE-WATER-PROTECTION-PLAN. A COPY OF THE
ASSESSMENT IS ALSO AVAILABLE UPON REQUEST.

Time and Place of
Regularly Scheduled Board Meetings for Public Participation: MEETING ARE HELD
ON THE THRID WEDNESDAY OF EACH MONTH AT 6:00 PM AT THE DISTRICT OFFICE LOCATED
AT 9429 CERRA VISTA STREET, APPLE VALLEY, CA 92308.

For More Information, Contact: DANIEL B. SMITH
760-247-7330

About This Report

We test the drinking water quality for many
constituents as required by state and federal regulations.  This report shows the results of our
monitoring for the period of January 1 to December 31, 2024, and may include
earlier monitoring data.

Importance of This Report Statement in Five
Non-English Languages (Spanish, Mandarin, Tagalog, Vietnamese, and Hmong)

Language in Spanish:  Este informe contiene
información muy importante sobre su agua para beber.  Favor de comunicarse APPLE VALLEY HEIGHTS
COUNTY WATER DISTRICT, 9429 CERRA VISTA STREET, APPLE VALLEY, CA 92308.
760-247-7330. para asistirlo en español.

Language in Mandarin:  这份报告含有关于您的饮用水的重要讯息。请用以下地址和电话联系 APPLE VALLEY HEIGHTS COUNTY WATER DISTRICT 以获得中文的帮助: 9429 CERRA VISTA STREET, APPLE VALLEY, CA 92308.
760-247-7330.

Language in Tagalog: Ang pag-uulat na ito ay naglalaman ng mahalagang impormasyon tungkol sa
inyong inuming tubig.  Mangyaring
makipag-ugnayan sa APPLE VALLEY HEIGHTS
COUNTY WATER DISTRICT, 9429 CERRA VISTA STREET, APPLE VALLEY, CA 92308 o tumawag sa 760-247-7330
para matulungan sa wikang Tagalog.

Language in Vietnamese:  Báo cáo này chứa thông tin
quan trọng về nước uống của bạn.  Xin vui lòng liên hệ APPLE VALLEY HEIGHTS COUNTY WATER DISTRICT tại 9429 CERRA VISTA STREET, APPLE VALLEY, CA 92308. 760-247-7330. để được hỗ trợ giúp bằng
tiếng Việt.

Language in Hmong:  Tsab
ntawv no muaj cov ntsiab lus
tseem ceeb txog koj cov
dej haus.  Thov
hu rau APPLE VALLEY HEIGHTS
COUNTY WATER DISTRICT
ntawm 9429 CERRA VISTA
STREET, APPLE VALLEY, CA 92308. 760-247-7330. rau kev pab hauv
lus Askiv.

Terms Used in This
Report

Term

Definition

Level
1 Assessment

A Level 1 assessment is a study of the water
system to identify potential problems and determine (if possible) why total
coliform bacteria have been found in our water system.

Level
2 Assessment

A Level 2 assessment is a very detailed study
of the water system to identify potential problems and determine (if
possible) why an E. coli MCL
violation has occurred and/or why total coliform bacteria have been found in
our water system on multiple occasions.

Maximum
Contaminant Level (MCL)

The highest level of a contaminant
that is allowed in drinking water.
Primary MCLs are set as close to the PHGs (or MCLGs) as is
economically and technologically feasible.
Secondary MCLs are set to protect the odor, taste, and appearance of
drinking water.

Maximum
Contaminant Level Goal (MCLG)

The level of a contaminant
in drinking water below which there is no known or expected risk to
health.  MCLGs are set by the U.S.
Environmental Protection Agency (U.S. EPA).

Maximum
Residual Disinfectant Level (MRDL)

The highest level of a
disinfectant allowed in drinking water.  There is convincing evidence that addition of a disinfectant is necessary for control of
microbial contaminants.

Maximum
Residual Disinfectant Level Goal (MRDLG)

The level of a drinking water disinfectant
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.

Primary
Drinking Water Standards (PDWS)

MCLs and MRDLs for contaminants that affect
health along with their monitoring and reporting requirements, and water
treatment requirements.

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.

Regulatory
Action Level

(AL)

The concentration of a contaminant which, if
exceeded, triggers treatment or other requirements that a water system must
follow.

Secondary
Drinking Water Standards (SDWS)

MCLs for contaminants that affect taste,
odor, or appearance of the drinking water.
Contaminants with SDWSs do not affect the health
at the MCL levels.

Treatment
Technique

(TT)

A required process intended
to reduce the level of a contaminant in drinking
water.

Variances
and Exemptions

Permissions from the State Water Resources
Control Board (State Board) to exceed an MCL or not comply with a treatment
technique under certain conditions.

ND

Not
detectable at testing limit.

ppm

parts
per million or milligrams per liter (mg/L)

ppb

parts
per billion or micrograms per liter (µg/L)

ppt

parts
per trillion or nanograms per liter (ng/L)

ppq

parts
per quadrillion or picogram per liter (pg/L)

pCi/L

picocuries
per liter (a measure of radiation)

Sources of Drinking
Water and Contaminants that May Be Present in Source Water

The sources of
drinking water (both
tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs,
springs, and wells.  As water travels
over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive
material, and can pick up substances resulting from the presence of animals or
from human activity.

Contaminants that may
be present in source water include:

·
Microbial
contaminants, such as viruses and bacteria, that may come from sewage treatment
plants, septic systems, agricultural livestock operations, and wildlife.

·
Inorganic
contaminants, such as salts and metals, that can be naturally-occurring
or result from urban stormwater runoff, industrial or domestic wastewater
discharges, oil and gas production, mining, or farming.

·
Pesticides and
herbicides, that may come from a variety of sources such as agriculture, urban
stormwater runoff, and residential uses.

·
Organic chemical
contaminants, including synthetic and volatile organic chemicals, that are
byproducts of industrial processes and petroleum production, and can also come
from gas stations, urban stormwater runoff, agricultural application, and
septic systems.

·
Radioactive
contaminants, that can be naturally-occurring or be
the result of oil and gas production and mining activities.

Regulation of Drinking Water and Bottled
Water Quality

In order to ensure that tap water is safe to drink, the U.S. EPA and the State Board
prescribe regulations that limit the amount of certain contaminants in water
provided by public water systems.  The
U.S. Food and Drug Administration regulations and California law also establish
limits for contaminants in bottled water that provide the same protection for
public health.

About Your Drinking Water
Quality

Drinking Water
Contaminants Detected

Tables 1, 2, 3, 4, 5, 6, and 8 list all of the
drinking water contaminants that were detected during the most recent sampling
for the constituent.  The presence of these contaminants in the
water does not necessarily indicate that the water poses a health risk.  The State Board allows us to monitor for certain contaminants less than once per year
because the concentrations of these contaminants do
not change frequently.  Some of the data,
though representative of the water quality, are more than one year old.  Any violation of an AL, MCL, MRDL, or TT is
asterisked.  Additional information
regarding the violation is provided later in this report.

Table 1.  Sampling
Results Showing the Detection of Coliform Bacteria

Complete if bacteria are detected.

Microbiological
Contaminants

Highest No. of
Detections

No. of Months in
Violation

MCL

MCLG

Typical Source of
Bacteria

E. coli

0

0

(a)

0

Human
and animal fecal waste

(a)
Routine and repeat samples are total coliform-positive and either is E. coli-positive
or system fails to take repeat samples following E. coli-positive routine sample or system fails to analyze total
coliform-positive repeat sample for E.
coli.

Table 2.  Sampling
Results Showing the Detection of Lead and Copper

Complete
if lead or copper is detected in the last sample set.

Lead and Copper

Sample Date

No. of Samples
Collected

90th
Percentile Level Detected

No. Sites Exceeding
AL

AL

PHG

Typical Source of

Contaminant

Lead (ppb)

7-02-2022

7-12-2022

7-14-2022

7-16-2022

7-18-2022

7-28-2022

10

0

NONE

15

0.2

Internal
corrosion of household water plumbing systems; discharges from industrial
manufacturers; erosion of natural deposits

Copper (ppm)

7-02-2022

7-12-2022

7-14-2022

7-16-2022

7-18-2022

7-28-2022

10

0.060

NONE

1.3

0.3

Internal
corrosion of household plumbing systems; erosion of natural deposits;
leaching from wood preservatives

Table 3.  Sampling Results for Sodium and Hardness

Chemical or Constituent (and reporting units)

Sample Date

Level Detected

Range of Detections

MCL

PHG (MCLG)

Typical Source of Contaminant

Sodium (ppm)

06-20-2023

83.000

83.000

None

None

Salt present in the
water and is generally naturally occurring

Hardness (ppm)

06/20/2023

230.000

230.000

None

None

Sum of polyvalent cations present in the
water, generally magnesium and calcium, and are usually naturally occurring

Table 4.  Detection of Contaminants with a Primary
Drinking Water Standard

Chemical or
Constituent

(and

reporting units)

Sample Date

Level Detected

Range of Detections

MCL [MRDL]

PHG (MCLG) [MRDLG]

Typical Source of
Contaminant

Fluoride
(m/gL)

06-20-2023

1.200

1.200

2.000

1.000

Erosion of natural deposits; water
additive which promotes strong teeth; discharge from fertilizer and aluminum
factories

Nitrate (as N) (mg/L)

08-08-2024

12-04-2024

0.723

0.6900-0.7400

10.000

0.400

Runoff and leaching
from fertilizer use; leaching from septic tanks and sewage; erosion of natural
deposits

Radium (pCi/l)

2-12-20

4-21-20

5-27-20

8-19-20

1.410

0.770-2.020

5.000

5.000

Erosion of natural
deposits

Table 5.  Detection of Contaminants with a Secondary
Drinking Water Standard

Chemical or Constituent
(and reporting units)

Sample Date

Level Detected

Range of Detections

SMCL

PHG (MCLG)

Typical Source

of

Contaminant

Chloride (mg/L)

06-20-2023

21.000

21.000

500.000

Runoff/leaching from
natural deposits; seawater influence

Sulfate (mg/L)

06-20-2023

300.000

300.000

500.000

Runoff/leaching from
natural deposits; seawater influence

Total Dissolved Solids (mg/L)

06-20-2023

550.000

500.000

1000.000

Runoff/leaching from
natural deposits

Specific Conductance (umho/cm)

06-20-2023

850.000

850.000

1600.000

Substances that form
ions when in water; seawater influence

Table 6.  Detection of Unregulated Contaminants

Chemical or
Constituent (and reporting units)

Sample Date

Level Detected

Range of Detections

Notification Level

Health Effects

Boron (ug/L)

06-20-2023

780.000

780.000

100.000

Boron exposures
resulted in decreased fetal weight (developmental effects) in newborn rats

Additional General
Information on Drinking Water

Drinking water, including bottled water, may
reasonably be expected to contain at least small amounts of
some contaminants.  The presence
of contaminants does not necessarily indicate that the water poses a health
risk.  More information about
contaminants and potential health effects can be obtained by calling the U.S.
EPA’s Safe Drinking Water Hotline (1-800-426-4791).

Some
people may be more vulnerable to contaminants in drinking water than the
general population.  Immuno-compromised persons such as persons with cancer
undergoing chemotherapy, persons who have undergone
organ transplants, people with HIV/AIDS or other immune system disorders, some
elderly, and infants can be particularly at risk from infections.  These people should seek advice about
drinking water from their health care providers.  U.S. EPA/Centers for Disease Control (CDC)
guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial
contaminants are available from the Safe Drinking Water Hotline
(1-800-426-4791).

Lead-Specific Language:  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.  [Enter Water System’s Name] 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.  [Optional: If you do so, you
may wish to collect
the flushed water and reuse it for another beneficial purpose, such as watering
plants.]  If you are concerned about lead
in your water, you may wish to have your water tested.  Information on lead in drinking water,
testing methods, and steps you can take to minimize exposure is available from
the Safe Drinking Water Hotline (1-800-426-4791) or at http://www.epa.gov/lead.

Additional Special Language for Nitrate, Arsenic, Lead, Radon, and Cryptosporidium:  [Enter Additional Information
Described in Instructions for SWS CCR Document]

State Revised Total
Coliform Rule (RTCR): This Consumer Confidence Report (CCR) reflects changes in
drinking water regulatory requirements during 2023. 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 of protecting 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. Summary Information
for Violation of a MCL, MRDL, AL, TT, or Monitoring and Reporting Requirement

Summary Information for Violation of a MCL, MRDL, AL,
TT, or Monitoring and Reporting Requirement

Table 7. Violation of a
MCL, MRDL, AL, TT or Monitoring Reporting Requirement

Violation

Explanation

Duration

Actions
Taken to Correct Violation

Health
Effects Language

Total Coliform

Our water system failed the drinking water
standard for total coliform during May and October 2024.

Two Days in May. Three days in October.

We have improved water sample procedures.
Flushing the water tap for 5 minutes. Spray with 10% chlorine solution or
flame and allow to sit for ~ 1 min before sampling.

Coliforms are
bacteria that are naturally present in the environment and are used as an
indicator that other, potentially harmful, waterborne pathogens may be
present or that a potential pathway exists through which contamination may
enter the drinking water distribution system. We found coliforms indicating
the need to look for potential problems in water treatment or distribution.
When this occurs, we are required to conduct assessment(s)
to identify problems and to correct any problems that were found.

For Water Systems Providing Groundwater as a Source of Drinking
Water

Table 8.  Sampling Results Showing Fecal
Indicator-Positive Groundwater Source Samples

Microbiological
Contaminants (complete if fecal-indicator detected)

Total No. of Detections

Sample
Dates

MCL [MRDL]

PHG (MCLG)
[MRDLG]

Typical
Source of Contaminant

E.
coli

0

Not applicable

0

(0)

Human
and animal fecal waste

Enterococci

0

Not applicable

TT

N/A

Human
and animal fecal waste

Coliphage

0

Not applicable

TT

N/A

Human
and animal fecal waste