This report is provided to inform you about the source and quality of your drinking water, and how it compares to national drinking water standards. This report is a snapshot of last year's water quality. Please take a moment to review this important information.
Creekwood Park gets its water from a shallow well next to Wasilla Creek. For regulation purposes, this source is considered surface water and contains naturally high concentrations of Iron and Manganese.
The water for Creekwood Park is processed in 6 stages:
- An oxidizer known as potassium permanganate (a very pink chemical) is added and mixed thoroughly with the source water to draw the iron and manganese out of solution.
- A polymer filter aid and a coagulant polymer are added after the permanganate to cause the bits of iron that have been pulled out of solution. This helps the iron form clumps that are large enough to be filtered out.
- The water first goes through a custom up-flow pre-filter where the majority of the iron and manganese is filtered out.
- Next it goes through a set of multi-media filters which further filters out any small particles that made it through the pre-filter.
- Next is an LT-2 filter which removes any pathogens the previous 2 filter stages may have missed
- Phosphate Addition
- A blended phosphate is added in small quantities to reduce scale deposits associated with water hardness
- In the event that filtration fails, the water is subjected to two methods of disinfection. The water first goes through a UV disinfection system to inactivate bacteria and cysts, then is dosed with chlorine and forced through over a quarter mile of coiled tubing to ensure all viruses are inactivated or killed.
- Once the water has finished its quarter mile long journey, it then flows into the 35,000 Gallon storage tank
- The storage tank is constantly circulated and is regularly dosed as required to remain disinfected.
- From there the water flows out of the tank and into each building.
No source water assessment has been completed for this utility due to ADEC budget limitations.
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, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.
- Inorganic contaminants, such as salts and metals, which 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, which 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, which are byproducts of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, and septic systems.
- Radioactive contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities.
In order to ensure that tap water is safe to drink, EPA prescribes regulations which limit the amount of certain contaminants in water provided by public water systems. Food and Drug Administration regulations establish limits for contaminants in bottled water which must provide the same protection for public health.
Some people may be more vulnerable to contaminants in drinking water than the general population. The following people may be more at risk from infections due to water impurities:
- 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
- Elderly Persons
These people should seek advice about drinking water from their healthcare providers. EPA/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
Impurities in the Water
Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some impurities. The presence of impurities does not necessarily indicate that water poses a health risk. More information about impurities and potential health effects can be obtained by calling the EPA’s Safe Drinking Water Hotline (1-800-426-4791).
To eliminate unnecessary testing expense, the system has applied for and received testing waivers for the following impurities:
There is no asbestos pipe in the system.
Synthetic Organic Chemicals (SOC)
An SOC waiver was granted in 2016 due to no potential sources of SOC contamination being located within the collection area. Renewal of the waiver is required in 2018 and requires an investigation of the collection area to ensure no sources of contamination exist.
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. This utility 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 in 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/safewater/lead
Water Quality Testing
Because of the numerous potential sources and varieties of impurities, state and federal law mandates the routine testing for all impurities (over 80) known to pose a risk to public health. Some impurities can affect water sources quickly and others are not expected to vary significantly from year to year. Thus, testing schedules also vary from monthly to once every nine years, depending on risk and the impurity tested. Your water system is routinely monitored for all applicable hazardous impurities. However, of those impurities, only those detected in routine testing are listed in the Detected Impurities table.
|Impurity||Year||Units||MCL||MCLG||Reported Value||Range||Violation||Likely Source|
|Barium||2018||ppb||2000||2000||16||N/A||N||Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits|
|Chlorine (as Cl₂)||2018||ppm||4||4||2||0.2-2||N||Water additive used to control microbes|
|Haloacetic acids (HAA5)||2018||ppb||60||N/A||47.78||42-52.3||N||Byproduct of drinking water disinfection|
|Nickel||2018||ppb||N/A||N/A||1||N/A||N||Erosion of natural deposits|
|Radium 226 and Radium 228 (combined)||2016||pCi/L||5||0||0.314||0.1-0.314||N||Erosion of natural deposits|
|Total Trihalomethanes (TTHMs)||2018||ppb||80||N/A||43.5||36.4-52||N||Byproduct of drinking water disinfection|
|Beta Particles||2016||pCi/L||4||0||6.6||N/A||N||Decay of natural and man-made deposits of certain minerals that are radioactive and may emit forms of radiation known as photons and beta radiation|
|Impurity||Year||Units||MCL||MCLG||Reported Value||Samples > MCL||Violation||Likely Source|
|Copper||2018||ppb||1300||1300||330||0||N||Corrosion of household plumbing systems; erosion of natural deposits|
Definitions And Terms
- (Maxiumum Contaminant Level) The highest level of an impurity allowable in drinking water.
- (Maximum Contaminant Level Goal) The amount of an impurity below which there is no known or expected health risk.
- (Maximum Residual Disinfectant Level) The highest level of a disinfectant allowed in drinking water.
- (Maximum Residual Disinfectant Level Goal) The level of a drinking water disinfectant below which there is no known or expected health risk.
- (Action Level) The concentration of an impurity which, when exceeded, triggers treatment or other requirements that a water system must follow.
- (Treatment Technique) A required process intended to reduce the level of an impurity in drinking water.
- (Parts Per Million) This measure corresponds to one penny out of $10,000 or one minute out of about 2 years. 1 ppm is essentially one millionth of the total water volume.
- (Milligrams Per Liter) This is another way of displaying PPM. See PPM for a definition.
- (Parts Per Billion) This measure corresponds to one penny out of $10,000,000 or one minute out of about 2000 years. 1 ppb is essentially one billionth of the total water volume.
- (Micrograms Per Liter) This is another way of displaying PPB. See PPB for a definition.
- (Picocuries Per Liter) This is a unit of radioactivity corresponding to one decay every 27 seconds in a volume of one liter of water, or 0.037 decays per second in every liter of air. For a comparison, an average banana contains about 520 Picocuries of radiation.
- (Millirems Per Year) a Millirem is a measure of the health effect of low levels of ionizing radiation on the human body. For some perspective, eating a banana every day for a year would expose you to about 3.6 mrem/Yr.
- (Nephelometric Turbidity Units) This is a precise measurement of how cloudy the water is. The higher the number, the cloudier the water is.
During the months of January and February and March,September and December monthly operator reports were submitted late.
The system was returned to compliance upon submission of the operator reports.
The system operator is working to streamline their processes to ensure operator reports are submitted on time.
Possible Negative Health Effects
There are no negative health effects associated with this violation.
Water Quality Report Content
Minor content errors were not corrected before the June 30 deadline and the system has been returned to compliance.
Errors were corrected within 10 days of the deadline and required certification of delivery was submitted.
Possible Negative Health Effects
No health effects are related to the water quality report content.
Saving Water is Saving Money
Water treatment at Creekwood Apartments is very complex and is therefore very expensive. Wasting water adversely effects the operation of they system and will ultimately result in higher costs passed on to you the customer. Please promptly report any leaking fixtures such as toilets or faucets.
HAA5 and TTHM Results
In 2017 HAA5 and TTHM testing exceeded the MCL. As a result, monitoring was increased and a running annual average was calculated each quarter. Modifications to the treatment system reduced the levels below the MCL for all of 2018, however, the running average was above the limit for the first two quarters of 2018. The running annual average is now below the MCL.
Maintenance & Emergency
If you have any questions, need to report an emergency, have any questions about your water bill, or are simply interested in learning more about Alpat Water Utility\'s drinking water system, Northern Utility Services staff is pleased to assist you, Office hours are 8:00 - 5:00 Mon-Fri.
Tel: (907) 222-4084
Emergency response is available via answering service 24 hours a day, 7 days a week.
Alpat Water Utility
Public Water System Identification (PWSID)
Anchorage, AK 99523