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 – December 31, 2025 and may include earlier monitoring data.
Este informe contiene información muy importante sobre su agua potable. Tradúzcalo o hable con alguien que lo entienda bien.
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 (USEPA).
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 (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.
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.
Regulatory Action Level (AL): The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.
Variances and Exemptions: State Board permission 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)
umhos/cm: micromhos per centimeter. Measurement for conductivity of 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:
In order to ensure that tap water is safe to drink, the USEPA and the State Water Resources Control Board (State Board) prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. State Board regulations also establish limits for contaminants in bottled water that provide the same protection for public health.
Tables 1, 2, 3, 4, and 5 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.
| Microbiological Contaminants (complete if bacteria detected) |
Highest No. of Detections | No. of Months in Violation | MCL | MCLG | Typical Source of Bacteria |
|---|---|---|---|---|---|
| Total Coliform Bacteria (state Total Coliform Rule) | 0 | 0 | 1 positive monthly sample (a) | 0 | Naturally present in the environment |
| Fecal Coliform or E. coli (state Total Coliform Rule) | 0 | A routine sample and a repeat sample are total coliform positive, and one of these is also fecal coliform or E. coli positive | Human and animal fecal waste | ||
| E. coli (federal Revised Total Coliform Rule) | 0 | (b) | 0 | Human and animal fecal waste |
(a) Two or more positive monthly samples is a violation of the MCL.
(b) 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.
| Lead and Copper (complete if lead or copper detected in the last sample set) | Sample Date | No. of samples collected | 90th percentile level detected | No. sites exceeding AL | AL | PHG | Typical Source of Contaminant |
|---|---|---|---|---|---|---|---|
| Lead (ppm) | 8-16-2024 | 30 | .0029 | 0 | .015 | 0.2 | Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits |
| Copper (ppm) | 8-16-2024 | 30 | .073 | 0 | 1.3 | 0.3 | Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives |
| Chemical or Constituent (and reporting units) | Sample Date | Average Level Detected | Range of Detections | MCL | PHG (MCLG) | Typical Source of Contaminant |
|---|---|---|---|---|---|---|
| Sodium (ppm) | 8-7-2024 | 12.6 | 7.5-15 | none | none | Salt present in the water and is generally naturally occurring |
| Hardness (ppm) | 8-7-2024 | 79 | 46-90 | none | none | Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually naturally occurring |
*Any violation of an MCL or AL is asterisked. Additional information regarding the violation is provided later in this report.
| Chemical or Constituent (and reporting units) | Sample Date | Average Level Detected | Range of Detections | MCL [MRDL] | PHG (MCLG) [MRDLG] | Typical Source of Contaminant |
|---|---|---|---|---|---|---|
| Arsenic (ppb) | 8-7-2024 | 2.5 | 2.1-3.4 | 10(b) | .004 | Erosion of natural deposits; runoff from orchards, glass & electronics production waste |
| Aluminum (ppb) | 8-7-2024 | ND | ND | 1000 | 600 | Alloys for beverage containers, electronics, vehicles, appliances, construction materials, household items, cosmetics; component of paints, pigments, missile fuel, and explosives; optical coatings |
| Barium (ppb) | 8-7-2024 | 16.6 | 2.5-38 | 1000 | 2 ppm | Leaching and erosion of minerals and rocks |
| Chromium (ppb) | 8-7-2024 | 3.2 | 5-9.1 | 50 | Discharge from steel and pulp mills and chrome plating; erosion of natural deposits | |
| Trihalomethane (TTHM) (ppb) | 9-23-2025 | 1.5 | ND-2.9 | 80 | .06-.5 | By-product of using chlorine to disinfect the distribution system |
| Haloacetic Acids (HAA5) (ppb) | 9-23-2025 | ND | ND | 60 | .03-.2 | By-product of using chlorine to disinfect the distribution system |
| Fluoride (ppm) | 8-7-2024 | .11 | .11-.12 | 2 | 1 | Medicine (prevent bone loss); result of sulfuryl fluoride (pesticide, fumigant) decay. Compounds may be used as metal treatment, glass etching, aluminum smelting, pesticides, chemical synthesis, dental care products, or municipal public health water additive (prevents tooth decay) |
| Hexavalent Chromium (ppb) | 10-16-2024 | 1.4 | .17-2 | 10 | .02 | Industrial uses of hexavalent chromium compounds include chromate pigments in dyes, paints, inks, and plastics; chromates added as anticorrosive agents to paints, primers, and other surface coatings; and chromic acid electroplated onto metal parts to provide a decorative or protective coating |
| Nitrate (ppm) | 10-7-25 | ND-1.8 | 1.1-2.2 | 10 | Erosion of natural deposits; runoff from orchards, glass & electronics production waste |
| Chemical or Constituent (and reporting units) | Sample Date | Average Level Detected | Range of Detections | MCL | PHG (MCLG) | Typical Source of Contaminant |
|---|---|---|---|---|---|---|
| Sulfate (ppm) | 8-7-2024 | 5.9 | 2.7-10 | 500 | n/a | Runoff/leaching from natural deposits; industrial waste |
| Color | 8-7-2024 | 7 | 5-10 | 15 | n/a | Dissolved elements and suspended impurities |
| Turbidity | 8-7-2024 | .11 | .11 | 5 | 1 | Measurement of water clarity |
| Iron (ppb) | 8-7-2024 | ND | ND | 300 | 300 | Runoff/leaching from natural deposits in the soil |
| Total Dissolved Solids (TDS) (ppm) | 8-7-2024 | 204 | 140-230 | 1000 | 500 | inorganic salts, as well as small amounts of organic matter |
| Specific Conductivity (microsiemens per cm) | 8-7-2024 | 226 | 130-250 | 1600 | 500 | Substances that form ions when in water; seawater influence |
| Zinc (ppb) | 8-7-2024 | 10 | 8.2-13 | 5000 | 5000 | Runoff/leaching |
| Odor | 7-31-2025 & 10-7-2025 | 1 | 1-4 | 3 | 0 | Can be the result of organic matter, bacteria, failing pipes and other infrastructure, disinfectants |
| Foaming Agents (ppm) | 8-7-2024 | ND | ND | .5 | .5 | Runoff from industrial sources such as agriculture, manufacturing and cosmetics |
| Chloride (ppm) | 8-7-2024 | 6.5 | 5-9.1 | 500 | n/a | Runoff/leaching from natural deposits; industrial waste |
| Chemical or Constituent (and reporting units) | Sample Date | Average Level Detected | Range of Detections | Notification Level | MCL | Health Effects Language |
|---|---|---|---|---|---|---|
| PFBS – Perfluorobutane sulfonic acid (ppt) | 5-8-25 | 4.2 | 3-5.4 | 2 | – | PFBS exposure resulted in decreased thyroid hormone in pregnant female mice |
| PFOA – Perfluorooctanoic acid (ppt) | 5-8-25 | 11 | 11 | 2 | 4 | PFOA exposures resulted in increased liver weight and cancer in laboratory animals |
| PFOS – Perfluorooctane sulfonic acid (ppt) | 5-8-25 | 7 | 7 | 2 | 4 | PFOS exposures resulted in immune suppression and cancer in laboratory animals |
| PFHxS – Perfluorohexane sulfonic acid (ppt) | 5-8-25 | 3.7 | 3.7 | 2 | 10 | PFHxS exposures resulted in decreased total thyroid hormone in male rats |
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 USEPA'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. USEPA/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: 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. Pinedale County Water District is responsible for providing high quality drinking water and removing lead pipes, but cannot control the variety of materials used in plumbing components in your home. You share the responsibility for protecting yourself and your family from the lead in your home plumbing. You can take responsibility by identifying and removing lead materials within your home plumbing and taking steps to reduce your family's risk. Before drinking tap water, flush your pipes for several minutes by running your tap, taking a shower, doing laundry or a load of dishes. You can also use a filter certified by an American National Standards Institute accredited certifier to reduce lead in drinking water. If you are concerned about lead in your water and wish to have your water tested, contact Pinedale County Water District, 480 W. Birch Ave., Fresno, CA 93650. Telephone 559-439-2362. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available at http://www.epa.gov/safewater/lead.