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Public Notice

2023 Annual Drinking Water Quality Report

                                 PWSID # 7210063 Middlesex Township Municipal Authority

Click to download the CCR Report – 2023 PDF Version                                                             

Este informe contiene información importante acerca de su agua potable. Haga que alguien lo traduzca para usted, ó hable con alguien que lo entienda.  (This report contains very important information about your drinking water.  Translate it or speak to someone who understands it).




This report is designed to inform you about the quality of water and the service we deliver to you every day. If you have any questions about this report or concerning your water utility, please contact Rory L. Morrison at (717) 243-0674 or Toll Free at 1-888-417-0674.  We want our valued customers to be informed about their water utility.  If you want to learn more, please feel free to attend any of our regularly scheduled meetings.  They are held on the third Thursday of each month at 7:00 PM, at the Administration Building located at 350 N. Middlesex Road, Carlisle, PA 17013.




The Middlesex Municipal Authority purchases water supplied to you from South Middleton Township Municipal Authority and produces water from its own groundwater source located in Middlesex Township. The water supplied to you from South Middleton is pumped from two (2) groundwater sources located in South Middleton Township.  Well No. 1 draws from the Tomstown Aquifer and was developed in 1972.  Well No. 1 is located along Park Drive across from PPG Industries. Well No. 2 draws from the Elbrook Aquifer and was developed in 1975.  Well No. 2 is located one mile west of Boiling Springs, south Route 174.


In July of 2010 Middlesex Township Municipal Authority began using its own permitted groundwater supply.

Well No. 1, which is located west of South Middlesex Road and draws from the Rockdale Run Aquifer Formation and was constructed in the spring of 2004.


A Source Water Assessment of our source was completed by the PA Department of Environmental Protection (PA DEP). The Assessment has found that our sources are potentially most susceptible to traditional point source contaminants ranging from gas stations, industrial manufactures, and auto repair shops, in addition to the traditional non-point potential contaminants ranging from residential and agricultural activities to sewer transmission lines and transportation corridors. Overall, our sources have little risk of significant contamination.

A summary report of the Assessment is available on the Source Water Assessment Summary Library webpage: Complete reports were distributed to municipalities, water suppliers, local planning agencies and PA DEP offices. Copies of the complete report are available for review at the PA DEP South Central Regional Office, Records Management Unit at 990 Elmerton Avenue, Harrisburg, PA 17110-8200-4732.


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.  EPA/CDC guidelines on appropriate means to lessen the risk of infection by cryptosporidium and other microbiological contaminants are available from the Safe Drinking Water Hotline (800-426-4791).




South Middleton Township Municipal Authority and Middlesex Township Municipal Authority routinely monitor constituents in your drinking water according to Federal and State laws.  The tables shown within this report are the results of monitoring for the period of January 1st to December 31st, 2023. The State allows us to monitor for some contaminants less than once a year because the concentration of these contaminants do not change frequently. Some of our data is from prior years in accordance with the Safe Drinking Water Act. The date has been noted on the sampling results table.








In the tables you will find many terms and abbreviations you might not be familiar with. To help you better understand these terms we have provided the following definitions:


Action Level (AL)The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.


Maximum Contaminant Level (MCL)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 (MCLG)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. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contamination.


Minimum Residual Disinfectant Level Goal (MinRDL) – The minimum level of residual disinfectant required at the entry point to the distribution system.


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


Nephelometric Turbidity Unit (NTU)nephelometric turbidity unit is a measure of the clarity of water.


PCi/L = picocuries per liter                                                       Mrem/year = millirems per (a measure

(a measure of the radioactivity)                                               of radiation absorbed by the body)


ppb = parts per billion, or micrograms                                        ppm = parts per million, or milligrams

per liter (ug/L)                                                                             per liter (mg/L)


ppt =   parts per trillion, or nanograms                                      ND = not detected




Water Quality Table for the South Middleton Township Municipal Authority Water System

PWSID NO. 7210050


Chemical or Radiological Contaminant MCL in CCR units MCLG Highest level Detected Range of Detection Units Violation Y/N Sources of Contamination  
Chromium (ppb) 100 100 2.0 1.0 –2.0 ppb N Discharge from steel and pulp mills; erosion of natural deposits.  


5 0 0.8 0.0 -0.8 ppb N Discharge from factories and dry cleaners.


2 2 0.051 0.042–0.051 ppm N Discharge of drilling wastes; discharge from metal refineries; erosion from natural deposits.  
  Xylenes (Total)


10 10 0.0022 N/A ppm N Discharge form petroleum and chemical factories.  
  Dalapon (SOC) 200 200 10.7 0.0 -10.7 ppb N Runoff from herbicide used on right of ways.  
  2,4-D (SOC) 70 70 2.3 0.0-2.3 ppb N Runoff from herbicide used on row crops.  


10 10 3.44 3.28-3.44 ppm N Runoff from fertilizer use; leaching from septic tanks, sewage, erosion from natural deposits.  
  Total Haloacetic Acids Five (HAA5) (2023) 60 n/a 15.8 4.23-15.8 ppb N By-product of drinking water chlorination  
  Trihalomethanes Total (TTHM’s) (2023) 80 n/a 42.8 1.2-42.8 ppb N By-product of drinking water chlorination  






Water Quality Table for Middlesex Township Municipal Authority Water System

PWSID NO. 7210063


Chemical or Radiological Contaminant MCL in CCR units MCLG Level Detected Range of Detection Units Violation Y/N Sources of Contamination
Chlorine MRDL= 4 MRDLG= 4 0.90 0.09-1.06 ppm  N Water additive used to control microbes
Total Haloacetic Acids Five (HAA5) (2023) 60 n/a 3.7 3.7 ppb N By-product of drinking water chlorination
Trihalomethanes Total (TTHM’s) (2023) 80 n/a 44.5 44.5 ppb N By-product of drinking water chlorination


10 10 8.6 8.0-8.6 ppm N Runoff from fertilizer use; leaching from septic tanks, sewage; erosion form natural deposits.


2 2 0.042 N/A ppm N Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits


100 100 2.5 N/A ppb N Erosion of natural deposits
Gross Alpha (2020) 15 15 3.4 3.4 PCi/L N  

Erosion of natural deposits


Entry Point Disinfectant Residual
Contaminant Minimum residual required Lowest






Units Sample




Source of Contamination
Chlorine (Site 102) 0.60 0.85 0.85-1.33 ppm 2023 N Water additive used to control microbes.
Contaminant Action






Units # of Sites Above AL of Total Sites Violation



Source of Contamination


15 0  


ppb 2 of 20 N Corrosion of household plumbing.


1.3 0 0.1800 ppm 0 of 20 N Corrosion of household plumbing


Violations: Middlesex Township Municipal Authority had one Tier 3 violation in the 2023 reporting year for collecting its annual Trihalomethane’s and Haloacetic Acids sample 4 days earlier than the scheduled date of

July 23, 2023. The sample was found to be in compliance for these contaminants. A violation also occurred for a failure to report for an SOC Endothall by the Laboratory. The sample was taken and analyzed, but was not reported to the Department due to a lab reporting error.


INFORMATION ABOUT LEAD: 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. Middlesex Township Municipal Authority 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 water 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


OTHER INFORMATION NITRATE:  Nitrate in drinking water at levels above 10 ppm is a health risk for infants of less than six months of age. High nitrate levels in drinking water can cause blue baby syndrome. Nitrate levels may rise quickly for short periods of time because of rainfall or agricultural activity. If you are caring for an infant, you should ask advice from your health care provider.


In order to assure the tap water is safe to drink, EPA and DEP prescribe the regulations which limit the amount of certain contaminants in the water provided by public water systems. FDA and DEP regulations establish limits for contaminants in bottled water which must provide the same protection for public health.

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 Environmental Protection Agency’s Safe Water Hotline (800-426-4791).



The average person uses about 62 gallons of water every day; most of the water is used for laundry, toilet flushing, and showering, followed by faucet use and leaky fixtures.


Try these water conservation tips and save water and money:

  • Replace the old toilet with a new 1.6 gallon-per-flush model. This can save 7,900 to 21,700 gallons of water per year.
  • Repair dripping faucets and leaking toilets (flapper valves are usually the cause). Repairs can save 10 gallons of water per person per day. A faucet dripping at one drop per second wastes 2,700 gallons of water per year.
  • Only wash clothes and dishes when you have a full load. When replacing an older machine, consider high efficiency models, which use an average of 30% less water and 40-50% less energy.
  • Install low-flow, water-efficient showerheads and faucets and save 1-to-7.5 gallons per minute. Taking a quick shower can save an average of 20 gallons of water per day.
  • Turn off the water when brushing your teeth or shaving to save more than 5 gallons of water per day.

                       For more water conservation tips visit the DEP website at

Medication Disposal

Medication Disposal

How do you get rid of your medication? Do you flush it down the toilet or down the drain? There are studies  that continue to show trace amounts of pharmaceuticals in drinking water supplies across our country. In addition, while wastewater treatment facilities are very effective at removing solids and harmful bacteria, they are not designed to filter pharmaceutical chemicals.  Medicines that are flushed down the drain or that leach from landfills end up in our waterways.  According to the most recent report from the President’s Cancer Panel, “Pharmaceuticals have become significant water pollutant nationwide.”  Researcher are finding evidence that even extremely diluted  concentrations of pharmaceutical residues harm frogs, fish and other water species in the wild and impair the workings of human cells in the laboratory.  Even in the tiniest amounts of medicine can harm aquatic life, for example antidepressants have been shown to disrupt fish reproductive cycle.

Abuse, mostly by teenagers and young adults, of prescription medications commonly found in homes is also an rising issue. Removing unwanted and expired medications from the home helps to eliminate this abuse.



Drop off boxMiddlesex Police  Department now has a Drug Disposal Drop Box.  This is a great opportunity for those who missed the previous events, or who have accumulated unwanted unused prescription drugs, to safety dispose of those medications.

The prescription drug disposal drop box is a secure and convenient way to dispose of leftover or out of date prescription medicines. The drop box is located in the police department lobby and is available during normal business hours, Monday-Friday from 8:00 am to 4:00 pm. Please take the medication to the Police Department for disposal.

For additional information and questions call the Middlesex Police Department during normal business hours at (717) 249-7191.