Central Area Water System Quality Data - Continued

Organics

Analyte	Units	Groundwater Concentrations		Greenway Surface Water Concentrations		Pyramid Peak Surface Water Concentrations		EPA Limit MCL	EPA Limit MCLG	Sample Date	Possible Sources
		Range	Average	Range	Average	Range	Average
Dibromochloropropane (DBCP)	ppt	ND-10	10	ND	ND	ND	ND	200	0	2007	Runoff/leaching from soil fumigant used on soybeans, cotton, pineapples, and orchards.
Dinoseb	ug/L	ND-0.3	0.3	ND	ND	NR	NR	7	7	2007	Runoff from herbicides used on soybeans and vegetables
Dibromochloropropane (DBCP)	Some people who drink water containing DBCP in excess of the MCL over many years could experience reproductive problems and may have an increased risk of getting cancer.
Dinoseb	Some people who drink water containing Dinoseb well in excess of the MCL over many years could experience reproductive difficulties.

Radiological

Analyte	Units	Groundwater Concentrations		Greenway Surface Water Concentrations		Pyramid Peak Surface Water Concentrations		EPA Limit MCL	EPA Limit MCLG	Sample Date	Possible Sources
		Range	Highest Average	Range	Highest Average	Range	Highest
Gross Alpha	pCi/L	ND-3.7	0.93*	ND-1.2	1.2	NR	NR	15	0	2007	Erosion of natural deposits
Gross Beta	mrem	ND-4	0.31*	ND	ND	NR	NR	NA	NA	2007	Decay of natural and man-made deposits
Radium 226	pCi/L	ND-0.4	0.07*	ND-1	1	NR	NR	NA	NA	2007	Erosion of natural deposits
Combined Radium	pCi/L	ND-0.4	0.07*	ND-1	1	NR	NR	5	0	2007	Erosion of natural deposits
Uranium	ug/L	ND-5.7	2.47	1.5-3.7	3.7	NR	NR	30	0	2007	Erosion of natural deposits
Radon	pCi/L	ND-515	273*	ND-358	358	NR	NR	NA	NA	2007	Erosion of natural deposits

Radon is a radioactive gas that you cannot see, taste, or smell. It is found throughout the United States. Radon can move up through the ground and into a home through cracks and holes in the foundation. Radon can build up to high levels in all types of homes. Radon can also get into the indoor air when released from tap water when showering, washing dishes, and other household activities. Compared to Radon entering the home through soil, radon entering the home through tap water will in most cases be a small source of radon in indoor air. Radon is a known carcinogen. Breathing air containing radon can lead to lung cancer. Drinking water containing radon may also cause increased risk of stomach cancer. If you are concerned about radon in your home, test the air in your home. Testing is inexpensive and easy. For additional information, call your state radon program or call EPA's Radon Hotline (800-SOS-RADON).

Turbidity

Surface Water Treatment Plant	Analyte	Units	Level Found	Range	MCL	MCLG	Possible Sources
Greenway	Turbidity	NTU	0.260	NA	TT=1 NTU	0	Soil runoff
			100.0%	NA	TT=% of samples <0.3 NTU	0	Soil runoff
Pyramid Peak	Turbidity	NTU	0.08	NA	TT=1 NTU	0	Soil runoff
			100.0%	NA	TT=% of samples <0.3 NTU	0	Soil runoff

Turbidity has no health effects. However, turbidity can interfere with disinfection and provide a medium for microbial growth. Turbidity may indicate the presence of disease-causing organisms. The organisms include bacteria, viruses, and parasites that can cause symptoms such as nausea, cramps, diarrhea, and associated headaches.

Unused Source Information

The Environmental Protection Agency implemented a new Arsenic Rule in January 2006 lowering the allowed level of Arsenic from 50 ppb to 10 ppb. The City of Peoria responded by turning off wells which exceeded the new standard. Wells are a significant part of the overall water portfolio for the community and a significant capital investment. Technologies available to reduce Arsenic are continuing to be developed and operation and maintenance costs are varied.

The City of Peoria has performed an evaluation of various technologies for Arsenic mitigation and an implementation plan is being developed. The goal is to apply effective technology while minimizing the cost to Peoria customers. Therefore the wells which currently exceed the standard are continued to be tested per EPA rules and regulations to ensure these capital investments remain available for use at a later date. Nitrate levels occasionally rise when wells are not pumped for a significant period of time.

The table below provides a range of the Arsenic and Nitrate levels of wells within the Peoria main system which are currently unused sources for Peoria, but tested routinely. These ranges indicate that several of the UNUSED wells exceed the federal level for Arsenic or Nitrate, but please note that water that exceeded federal and state standards was not served to Peoria residents during 2007. The Vistancia wells had no exceedances for Arsenic or Nitrate in 2007.

Unused Source

Analyte	Range	MCL	Possible Sources
Arsenic	2-20 ppb	10 ppb	Erosion of natural deposits
Nitrate	0.9-13.3 mg/L	10 mg/L	Fertilizer runoff, erosion of natural deposits