2007 Consumer Confidence Report

Water System Name:

Greenville Water Treatment Plant

Report Date:

March 16, 2008

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, 2007.

Este informe contiene información muy importante sobre su agua potable. Tradúzcalo ó hable con alguien que lo entienda bien.

Type of water source(s) in use:	Surface Water
Name & location of source(s):	Round Valley Reservoir
Drinking Water Source Assessment information:		A source Water Assessment has been completed for the surface
source serving Greenville. The source is considered most vulnerable to the following activities associated with contaminates detected in the Water Supply: Septic Systems– Low Density, Septic Systems Recreational Area – Surface Water Source. A copy of the complete assessment may be viewed at: DHS Lassen District Office. 415 Knoll Crest Dr, Suite 110. Redding, CA 96002. Attn: Mr. McNamera (530) 224-4800 or IVCSD- Greenville. PO Box 899. Greenville, CA. 95947 Attn: Leanna Moore (530) 284-7224
Time and place of regularly scheduled board meetings for public participation:					6:30pm on the second Wednesday of
each month in the Greenville Civic Center Community Meeting Room
For more information, contact:	Leanna Moore			Phone:		( 530 ) 284-7224

*TERMS USED IN THIS REPORT*:
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 level of a disinfectant added for water treatment that may not be exceeded at the consumer’s tap. 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 are set by the U.S. Environmental Protection Agency.			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: Department 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 (ug/L) ppt: parts per trillion or nanograms per liter (ng/L) pCi/L: picocuries per liter (a measure of radiation)

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.

In order to ensure that tap water is safe to drink, the USEPA and the state Department of Public Health (Department) prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. Department regulations also establish limits for contaminants in bottled water that must 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 Department 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.

Table 1 - sampling results showing the detection of coliform bacteria
Microbiological Contaminants (to be completed only if there was a detection of bacteria )	Highest No. of detections	No. of months in violation		MCL		MCLG	Typical Source of Bacteria
Total Coliform Bacteria	(In a mo.)	0		More than 1 sample in a month with a detection		0	Naturally present in the environment
Fecal Coliform or E. coli	(In the year)	0		A routine sample and a repeat sample detect total coliform and either sample also detects fecal coliform or E. coli		0	Human and animal fecal waste
Table 2 - sampling results showing the detection of Lead and copper
Lead and Copper (to be completed only if there was a detection of lead or copper in the last sample set)	No. of samples collected		90^th percentile level detected	No. sites exceeding AL	AL	PHG	Typical Source of Contaminant
Lead (ppb)	10		7.2		15	2	Internal corrosion of household water plumbing systems; discharges from industrial manufacturers; erosion of natural deposits
Copper (ppm)	10		0.062		1.3	0.17	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)	2005		1.7		none	none	Generally found in ground & surface water
Hardness (ppm)	2007		22		none	none	Generally found in ground & surface water

*Any violation of an MCL or AL is marked with an asterisk. Additional information regarding the violation is provided later in this report.

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
TTHM	27SEP07	35				80
Total Halocetic Acids ppb	27SEP07	24				60


TAble 5 - detection of contaminants with a Secondary Drinking Water Standard
Chemical or Constituent (and reporting units)	Sample Date	Level Detected		Range of Detections		MCL		PHG (MCLG)	Typical Source of Contaminant






TABLE 6 - DETECTION OF UNREGULATED CONTAMINANTS
Chemical or Constituent (and reporting units)	Sample Date		Level Detected		Notification Level		Health Effects Language

*Any violation of an MCL, MRDL, or TT is asterisked. Additional information regarding the violation is provided later in this report.

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 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).

Summary Information for Contaminants Exceeding an MCL, MRDL, or AL, or a Violation of Any Treatment Technique or Monitoring and Reporting Requirement

For Systems Providing Surface Water as a Source Of Drinking Water:

(Refer to page 1, “Type of water source in use” to see if your source of water is surface water or groundwater)

Table 7 - sampling results showing TREATMENT OF SURFACE WATER SOURCES
Treatment Technique ^(a) (Type of approved filtration technology used)
Turbidity Performance Standards ^(b) (that must be met through the water treatment process)	Turbidity of the filtered water must: 1 – Be less than or equal to ___0.5__ NTU in 95% of measurements in a month. 2 – Not exceed __1.0___ NTU for more than eight consecutive hours. 3 – Not exceed __5.0__ NTU at any time.
Lowest monthly percentage of samples that met Turbidity Performance Standard No. 1.	92%
Highest single turbidity measurement during the year	2.0NTU
Number of violations of any surface water treatment requirements	1

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

(b) Turbidity (measured in NTU) is a measurement of the cloudiness of water and is a good indicator of water quality and filtration performance. Turbidity results which meet performance standards are considered to be in compliance with filtration requirements.

* Any violation of a TT is marked with an asterisk. Additional information regarding the violation is provided earlier in this report.

Summary Information for Surface Water Treatment

Turbidity standards were not met in February. Notifications were distributed by mail. Turbidity has no health effects, however, high levels of turbidity can interfere with disinfection and provide a medium for microbial growth. Turbidity may indicate the presence of disease-causing organisms. These organisms include bacteria, viruses, and parasites that can cause symptoms such as nausea, cramps, diarrhea, and associated headaches.