ANNUAL DRINKING WATER QUALITY REPORT FOR 2017

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Annual Drinking Water Quality Report for 2017

Village of Northville

412 South Main Street, Northville, NY 12134

(Public Water Supply Identification Number NY1700023)

INTRODUCTION

To comply with State regulations, the Village of Northville will be annually issuing a report describing the quality of your drinking water. The purpose of this report is to raise your understanding of drinking water and awareness of the need to protect our drinking water sources. Last year, your drinking water met all State drinking water health standards. This report is a snapshot of last year’s water quality. Included are details about where your water comes from, what it contains, and how it compares to New York State standards. Our constant goal is and always has been, to provide to you a safe and dependable supply of drinking water. We want you to understand the efforts we make to continually improve the water treatment process and to protect our water resources. If you have any questions concerning this report or concerning your drinking water please contact: Mr. Darryl Roosa, Water System Operator, Village of Northville, PO Box 153, 412 South Main Street, Northville, NY 12134; Telephone (518)863-4211 or (518) 337-7761. We want our valued customers to be informed about their water utility. If you want to learn more, please attend any of our regularly scheduled Village Board meetings. They are held on the 3nd Tuesday of each month, 7:00 PM at the Town Hall (Bradt Building), 412 South Main Street, Northville, NY 12134; Telephone (518) 863-4211.

WHERE DOES OUR WATER COME FROM?

The Village of Northville draws its water from a ground water source. Groundwater or well water is stored below the surface of the earth in deep, porous rocks called “aquifers.” Groundwater is purified naturally as it filters through layers of soil, clay, rock and sand. This process, known as “percolation” takes years to complete. As a result, groundwater requires less treatment than surface water. We pump this groundwater out through our 2 wells; an 8″ well and an 18″ wells both equipped with 30HP pumps. The wells are run individually and alternated in their usage. Treatment of the raw water consists of the addition of chlorine in the form of sodium hypochlorite. It is added to the water for disinfection to protect against contamination from harmful bacteria and from other organisms. Soda ash is added to raise the pH and an inorganic phosphate blend is added for corrosion control. This serves to reduce lead and copper leaching into the water from residential water pipes and to help minimize corrosion in the water mains. We have two storage tanks with a combined storage capacity of 680,000 gallons to meet consumer demand and provide adequate fire protection. Much of the distribution system is made up of 4″, 6″ and 8″ cast iron mains. There are also some 6″ and 8″ asbestos mains in the distribution system. The water has been tested for asbestos and none has been detected. The distribution system is flushed twice a year.

The source water assessment performed by the New York State Health Department has rated our source water as having medium-high susceptibility to enteric viruses. It should be noted that the SWAP looks at the untreated water only. Our water is treated to minimize the potential sources of contamination. The SWAP summary for our water supply is attached to this report.

In general, 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 activities. Contaminants that may be present in source water include microbial contaminants; inorganic contaminants; pesticides and herbicides; organic chemical contaminants; and radioactive contaminants. In order to ensure that tap water is safe to drink, the State and EPA prescribe regulations, which limit the amount of certain contaminants in water, provided by public water systems. The State Health Department’s and the FDA’s regulations establish limits for contaminants in bottled water which must provide the same protection for public health.

FACTS AND FIGURES

The Village provides water through 553 service connections to a population of approximately 1,140 people. The total water pumped in 2017 was 32,110,000 gallons. Our average daily demand is 89,973 gallons. Our single highest day was 356,000 gallons. Customers in the Village are billed on water meters based on actual consumption. Additional information can be obtained by calling our office.

ARE THERE CONTAMINANTS IN OUR DRINKING WATER?

In accordance with State regulations, the Village of Northville routinely monitors your drinking water for numerous contaminants. We test your drinking water for inorganic contaminants, radiological contaminants, lead and copper, nitrate, volatile organic contaminants, and synthetic organic contaminants. In addition, we test 2 samples for coliform bacteria each month. The table presented below depicts which contaminants were detected in your drinking water. The state allows us to monitor for certain contaminants less than once per year because the concentrations of these

2

contaminants are not expected to vary significantly from year to year. Some of the data, though representative of the water quality, is more than one year old.

It should be noted that all drinking water, including bottled drinking water, may be reasonably expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily pose a health risk. More information about contaminants and potential health effects can be obtained by calling the EPA’s Safe Drinking Water Hotline (800-426-4791) or the New York State Department of Health, Herkimer District Office at (315) 866-6879. VILLAGE OF NORTHVILLE TABLE OF DETECTED CONTAMINANTS

Public Water Supply Identification Number NY1700023

Contaminant Violation

Y/N

 Level

Detected

 Unit

Measurement

 MCLG MCL Likely Source of Contamination
Inorganic Contaminants (sample data from 7/25/17 unless otherwise noted)
Chloride N 15 ppm N/A 250 Naturally occurring or indicative of road salt contamination.
Copper (samples from 9/23/15)

Range of copper concentrations

 N 4701

110-680

 ppb 1300 AL=1300 Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservative
Lead (samples from 9/23/15)

Range of lead concentrations

 N 12

ND-5

 ppb 0 AL=15 Corrosion of household plumbing systems, erosion of natural deposits
Nitrate (as Nitrogen) N 852 ppb 10,000 10,000 Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
Odor N 5 units N/A 3 Organic or inorganic pollutants originating from municipal and industrial waste discharges: natural sources
pH N 7.48 units 6.5-8.5
Sodium3 N 24 ppm N/A N/A Geology; Road Salt
Sulfate N 7.49 ppm N/A 250 Geology;
Zinc N 5.7 ppb N/A 5000
Disinfection Byproducts
Haloacetic Acids (HAA5)

(sample from 8/2/16)

 N 2.4 ppb N/A 60 By-product of drinking water chlorination
TTHM[Total Trihalomethanes

(sample from 8/2/16)

 N 6.9 ppb 0 80 By-product of drinking water chlorination
Chlorine (continuous monitoring) average

Range of chlorine residuals

 N 1.15

0.8-1.5

 ppm MRDLG MRDL Used in the treatment and disinfection of drinking water
N/A 4
NOTES–

1. The level presented represents the 90th percentile of 10 test sites. The action level for copper was not exceeded at any of the 10 sites tested.

2. The level presented represents the 90th percentile of 10 test sites. The action level for lead was not exceeded at any of the 10 sites tested.

3. Water containing more than 20 mg/l should not be consumed by persons on severely restricted sodium diets.

Non-Detects (ND) – laboratory analysis indicates that the constituent is not present.

Parts per million (ppm) or Milligrams per liter (mg/l) – one part per million corresponds to one minute in two years or a single penny in $10,000.

Parts per billion (ppb) or Micrograms per liter – one part per billion corresponds to one minute in 2,000 years, or a single penny in $10,000,000.

Picocuries per liter (pCi/L) – picocuries per liter is a measure of the radioactivity in water.

90th Percentile Value– The values reported for lead and copper represent the 90th percentile. A percentile is a value on a scale of 100 that indicates the percent of a distribution that is equal to or below it. The 90th percentile is equal to or greater than 90% of the lead and copper values detected at your water system

Action Level – the concentration of a contaminant, which, if exceeded, triggers treatment, or other requirements, which a water system must follow.

Treatment Technique (TT) – A treatment technique is a required process intended to reduce the level of a contaminant in drinking water.

Maximum Contaminant Level – The “Maximum Allowed” (MCL) is the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.

Maximum Contaminant Level Goal The “Goal” (MCLG) is the level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.

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.

Not applicable