Name 3 sources of contamination.

"There are many sources of contamination to consider in water quality testing. For the purposes of this question, I'll share three potential sources of contamination in this region. Given the number of farms in the area, I would consider local land-use practices as a potential source for contamination; this can include pesticides, fertilizers, or even livestock. We also have two nearby factories, so I would also consider manufacturing processes to potentially contribute to water contamination in this area. Of course, a third source of contamination could simply come from naturally occurring chemicals and minerals, such as arsenic or radon."

Contamination can come from a variety of sources on- and off-site. This is a basic knowledge-based question, though you will want to ensure that your response suits the area in which you're applying. Your interviewers will appreciate your demonstration of local knowledge beyond answering generically.For xample: "There are many sources of contamination to consider in water quality testing. For the purposes of this question, I'll share three potential sources of contamination in this region. Given the number of farms in the area, I would consider local land-use practices as a potential source for contamination; this can include pesticides, fertilizers, or even livestock. We also have two nearby factories, so I would also consider manufacturing processes to potentially contribute to water contamination in this area. Of course, a third source of contamination could simply come from naturally occurring chemicals and minerals, such as arsenic or radon."

How do you motivate yourself when operating independently?

"First, I remind myself daily of what draws me to my work and keeps me engaged. I maintain a detailed schedule in my planner, so I might leave a note there or ground myself in the car at the start of the day. When I focus on those fundamentals, I'm able to keep myself in a more productive and helpful mindset. Of course, I also like to incorporate additional little ways to stay motivated, like car karaoke on my way from the field to the lab!"

This position requires operating independently to meet your targets and largely drafting your own schedule, so your interviewers want to ensure that you are self-motivated and capable of operating independently at a consistently high level. Consider ways in which you motivate yourself at work and how you might apply those tricks to this position.

Are you familiar with the current water quality criteria for aquatic life and human health?

"I try to stay as current and informed as possible on regulations that impact water quality criteria in my service area, and I pursue additional national - even international - resources and information on a minimum quarterly basis. That said,I am very familiar with the criteria for human health, and I am also familiar with the fundamentals of the criteria for aquatic life."

Your interviewers will likely test the depth of your knowledge and understanding with varying levels of questions pertaining to water quality analysis. You will want to refresh your memory and update yourself thoroughly prior to your interview in anticipation of some of these questions. If you find yourself unsure of an answer, then provide as much relevant information as you're able and acknowledge that you will explore it further following your interview. You do not want to make your answer up on the spot if you are not familiar with the content of the question.

How would you explain water quality analysis and treatment to the average person in another industry?

"Water quality analysis involves regularly monitoring the physical, chemical, and biological characteristics of water's condition for the health and safety of people and wildlife. We know of a number of influences that can alter the safety and general aesthetic of water, so we test samples and follow various procedures on a daily basis to ensure that the water is safe by the time it gets to your faucet."

Communication is a valued component of this position, so your ability to describe and explain your work to others is important. When preparing for a question like this, consider practicing on friends or family members.

In what capacities are surface water quality models important and useful tools for water management?

"Water quality models serve as important tools for informing protective measures as well as generally educating the community on water quality. Models can be used for assessing the water quality conditions and the potential causes of impairment. They can also help us to predict how surface waters will likely respond to changes in their watersheds and the surrounding environment. They might also support in predicting future measures we might need to take o modify to ensure safe, consumable water for the community."

As a water quality analyst, you will need to take what you see in the field and in the lab and produce water quality models. These models help communities better understand water quality, how it changes, and what might influence those changes. These models can help inform protective measures to ensure that water quality meets standards, so it is a particularly important component of the position. When answering this question, consider offering at least 3 different capacities in which water quality models are important and useful.

How effective is cyanotoxin oxidation with chlorine when Anatoxin-a is present?

"As far as I am aware, cyanotoxin oxidation with chlorine is fairly ineffective when Anatoxin-a is present. It is a particularly unsafe neurotoxin in water, and chlorine has been found to be less effective compared to other cyanotoxin oxidation measures."

This question is designed to test the depth of your knowledge of this subject. Your interviewers will know if you are making up your answer as you go on questions such as this one, so be sure to study up prior to your interview. If you aren't sure of the answer, then share what you know and willing to admit when you might need to look more into something.

Explain the concept of 'multiple barriers' in water treatment.

"The multiple barrier concept essentially combines several elements and processes, or barriers, to ensure that water is consistently safe for human consumption. It follows the idea that one single process cannot be consistently relied upon to produce safe, consumable water for humans."

The interviewers will likely test the depth of your knowledge and ability to articulate concepts to others. Be prepared for specific, subject-based questions and scenarios. When answering, be sure to present yourself energetically and excited about the content. You want the interviewers to be left with the impression that you are passionate about this work.

What are the three main purposes of water treatment?

"Water treatment primarily focuses on health and safety, though it also incorporates a cosmetic function as well. The three main purposes of water treatment are: to remove any toxic or health-hazardous chemicals, to remove - or inactivate - any potential disease-causing microorganisms, and simply to improve the aesthetic quality of the water."

This is a knowledge-based question that should be considered standard. It might seem straightforward, but your interviewers will use this opportunity to see how well you answer a seemingly simple question under pressure as well as how easy you are to understand when breaking your answer down. Be sure to outline your response in advance so you don't catch yourself on your words, and keep it concise for your interviewers to easily digest.

Are you familiar with our state-specific water quality standards in addition to federal requirements?

"Yes, I am very familiar with federal and state guidelines regarding water quality standards. To stay informed, I continue to consult various resources with details on my region, state, and surrounding areas."

Your interviewers might ask this question to gauge the level of research you conducted to prepare you for the interview. In anticipation of this question, be sure to research federal and state requirements prior to your interview - particularly if you are applying in a new state or region.

What is your educational background?

"In 2010, I earned my Bachelor of Science degree from NC State University in Biochemistry with a minor in Environmental Science. Throughout my time in university, I gained valuable field and lab experience which supported a smooth transition to the career."

When preparing for this question, be sure to reference the job description for desired education information. Generally, science degrees are preferred in this position. If you don't have a science degree, then consider any additional - and relevant - educational opportunities that support your background.

Do you have any experience working in the public sector?

"I do - I have worked in water quality in the public sector for 3 of the last 5 years and in the private sector for 2 years."

You might come across public and private sector positions in water quality. Public sector positions are government-owned and operated, and your interviewers might find public sector experience to be valuable. Be sure to scan the job description for information on what level of public sector experience might be desired. When answering this question, you may use experience from any field within the public sector, even if it doesn't directly relate to water quality.

What methods are approved by the US Environmental Protection Agency to disinfect water?

"Through my education and experience, I am most familiar with the use of chloramine and chlorine to disinfect water. That said, science and technology make swift advancements, so I would love to research this a bit further for any new developments in this area."

This is a knowledge-based question that interviewers might ask you. Like any knowledge-based question, do not make up a random answer - try to provide any relevant information and suggest that you will explore the topic further.For xample: "Through my education and experience, I am most familiar with the use of chloramine and chlorine to disinfect water. That said, science and technology make swift advancements, so I would love to research this a bit further for any new developments in this area."

Why would water treatment switch from chloramine to chlorine disinfection?

"In some cases, water treatment might switch from chloramine to chlorine in order to remove a scum layer. I would love to explore this question further following the interview for any additional purposes that I might be less familiar with."

This question is purely testing your knowledge. Your interviewers will likely pepper-in a few knowledge-based questions to explore your understanding and ability to navigate being put on the spot. Remember - you don't want to make things up on these sorts of questions, so be prepared to own when you might need to explore something further.

What motivated you to become a water quality analyst?

"For as long as I can remember, I have always been drawn to water. I love how its taste varies, I love how peaceful a body of water can be, and of course I appreciate it's immense benefits to life on Earth. I think I started to consider water as a career when I was in high school and started learning more about sustainability and water supply. When I began pursuing this career option in college, I learned of the many impacts water quality also has on public health. It is difficult to attribute my motivation to any one of those things, but I am certainly inspired by the profession and passionate about contributing to it."

The interviewers are interested in your personal motivation(s) to enter this profession, so be honest and authentic with your response. Whether you are interested in conservation, sustainability, public health, or something else, always remember to project your excitement and enthusiasm for the position.

How are your written and verbal communication skills?

"My communication skills are strong and well-rounded. I have extensive experience professionally, educationally, and even personally in various modes of writing and speaking, from academic papers to public presentations. I am able to communicate to a wide audience and create a sense of connection and understanding regardless of the topic. I feel confident employing these skills in any way you find beneficial in this position."

In most water quality analyst positions, you will need to be able to communicate your findings in written or verbal form, so your interviewers are interested in your communication skills across mediums and audiences. When preparing for this question, be sure to touch on adapting to audiences to be technical or more descriptive.

What experience do you have interpreting data?

"I have experience interpreting data in the water quality field for several years in educational and professional capacities. I have also interpreted other forms of data, including demographic and other environmental data."

This position requires the ability to collect, interpret, and share data. Your interviewers will want to understand your level of familiarity to inform how much support and guidance you might need. When preparing for this question, refer to the job description to understand the level of data interpretation that might be required or desired.

Are you comfortable and willing to spend extended periods of time in hot, cold, and inclement weather?

"Absolutely. I have always wanted to be outdoors no matter the weather or where I've lived, so I more than welcome the opportunity to work any period of time outside."

Water quality is a hands-on industry for 365 days of the year, so you will need to be able to work through the elements. Consider the weather patterns in the region and whether or not you are able - and willing - to work through all seasons of the year. Do your research in advance. If you want to remain open to the position, then you will want your answer to be 'yes!' If you aren't sure or the answer is 'no,' then you might want to reconsider the job.

How do you ensure data integrity and traceability?

"The most reliable way to ensure data integrity and lead to traceability is to consistently maintain good documentation and organization practices. I also conduct routine audits to ensure that all of my information is aligned and accurate, so quality documentation to refer back to is crucial."

Data integrity is particularly important in water quality analysis, and the interviewers want to ensure that you value its importance and that you maintain good practices. Traceability supports data integrity by providing a trail of information to refer back to if needed. When answering this question, you'll want to emphasize good documentation and organization practices.

What do you do when your schedule or project plan is disrupted by unforeseen circumstances?

"I make it a priority to maintain a current, updated schedule and list of contacts so I have the time and ability to thoroughly plan in case circumstances change. Sometimes, circumstances change abruptly enough to prevent prior planning, such as a family emergency or getting unexpectedly sick. If that is the case, I always inform my supervisor of the situation, share my steps for maintaining coverage, and follow-up once I have confirmed coverage. Communication is key in these situations, so I try to maintain as many touchpoints as possible and remain available virtually - when possible - for whoever is supporting my coverage in case they have any questions or issues."

Your interviewers might ask this question to understand how you might handle a realistic possibility that might arise in the position. For example, you might have an emergency that prevents you from visiting certain field sites or returning to the lab. Things happen, and you remain accountable for your job and duties. Consider how you navigate interruptions in your everyday life and how you might in this position. Be sure to emphasize the importance of coverage and communication.

What are your top 3 to 4 skills that best support your success in this position?

"My top skills include interpersonal communication, organization, attention to detail, and the ability to work independently with minimal oversight. I believe that these skills support the position's need for a reliable, well-rounded, and detail-oriented candidate."

Given the nature of the position - working in the field, in labs, collecting and analyzing data, and sharing that data with others - you will want to emphasize skills that directly correlate to success in fulfilling the job, such as communication, organization, multi-tasking, and independent work with minimal oversight. Draw connections for your interviewers by linking your skills to the position or to examples or experiences you might have.

Are you able to meet the physical demands of this position?

"Maintaining good physical health is important to me, so I keep myself in shape and exercise regularly. So, yes, I am absolutely able to meet the physical demands of the position!"

This position requires visiting several sites, some of which might be fairly remote. You might find yourself walking or hiking with field supplies up to 30 pounds, so your interviewers want to ensure that you are physically capable of completing the job.For xample: "Maintaining good physical health is important to me, so I keep myself in shape and exercise regularly. So, yes, I am absolutely able to meet the physical demands of the position!"

Do you have a valid driver's license?

"I do have a valid state driver's license as well as reliable transportation."

This job will require driving out to various sites, so you will likely need to have a valid driver's license. If you do not have a valid license at the time of the interview, then offer your interviewers a date by which you will have one available.

How do you balance your calendar to include daily field visits and lab work?

"I try to maximize my time as efficiently as possible, so I tend to map out my day to follow a flow. I'll pick a starting point and work my way inward to the end point - the lab. By batching my fieldwork and lab work, I'm able to successfully balance my calendar and complete all of my tasks in a timely manner."

You will be required to work in the field, visiting perhaps multiple sites a day, and incorporate time to conduct lab work as well. This position requires a high level of self-discipline, organization, and time management. Be sure to emphasize your skills in those areas when answering this question.

What experience do you have with lab equipment?

"I have been working with lab equipment, particularly equipment required for water quality analysis, since university. During my junior and senior years, I began using lab equipment to support water quality research at the institution. Since the, I have continued to use lab equipment in a professional capacity as well."

This position often requires working in the field and in a lab, and you will likely pull samples and run tests in both locations. You will need to demonstrate your understanding of and comfort with using lab equipment and with safely handling samples and other lab materials.

Are you willing to work weekends?

"I am very open and flexible with my schedule, so I am able and willing to work weekends."

Government positions generally check water quality 365 days a year. Some private and government departments might offer 24-hour emergency service as well. Generally, you will want your answer to be 'yes' to this question to demonstrate that you are flexible and familiar with the expectations of the position.

Water Quality Analyst Interview Questions

Go Back

1. Name 3 sources of contamination.
2. How do you motivate yourself when operating independently?
3. Are you familiar with the current water quality criteria for aquatic life and human health?
4. How would you explain water quality analysis and treatment to the average person in another industry?
5. In what capacities are surface water quality models important and useful tools for water management?
6. How effective is cyanotoxin oxidation with chlorine when Anatoxin-a is present?
7. Explain the concept of 'multiple barriers' in water treatment.
8. What are the three main purposes of water treatment?
9. Are you familiar with our state-specific water quality standards in addition to federal requirements?
10. What is your educational background?
11. Do you have any experience working in the public sector?
12. What methods are approved by the US Environmental Protection Agency to disinfect water?
13. Why would water treatment switch from chloramine to chlorine disinfection?
14. What motivated you to become a water quality analyst?
15. How are your written and verbal communication skills?
16. What experience do you have interpreting data?
17. Are you comfortable and willing to spend extended periods of time in hot, cold, and inclement weather?
18. How do you ensure data integrity and traceability?
19. What do you do when your schedule or project plan is disrupted by unforeseen circumstances?
20. What are your top 3 to 4 skills that best support your success in this position?
21. Are you able to meet the physical demands of this position?
22. Do you have a valid driver's license?
23. How do you balance your calendar to include daily field visits and lab work?
24. What experience do you have with lab equipment?
25. Are you willing to work weekends?

Water Quality Analyst Interview Questions

1. Name 3 sources of contamination.

2. How do you motivate yourself when operating independently?

3. Are you familiar with the current water quality criteria for aquatic life and human health?

4. How would you explain water quality analysis and treatment to the average person in another industry?

5. In what capacities are surface water quality models important and useful tools for water management?

6. How effective is cyanotoxin oxidation with chlorine when Anatoxin-a is present?

7. Explain the concept of 'multiple barriers' in water treatment.

8. What are the three main purposes of water treatment?

9. Are you familiar with our state-specific water quality standards in addition to federal requirements?

10. What is your educational background?

11. Do you have any experience working in the public sector?

12. What methods are approved by the US Environmental Protection Agency to disinfect water?

13. Why would water treatment switch from chloramine to chlorine disinfection?

14. What motivated you to become a water quality analyst?

15. How are your written and verbal communication skills?

16. What experience do you have interpreting data?

17. Are you comfortable and willing to spend extended periods of time in hot, cold, and inclement weather?

18. How do you ensure data integrity and traceability?

19. What do you do when your schedule or project plan is disrupted by unforeseen circumstances?

20. What are your top 3 to 4 skills that best support your success in this position?

21. Are you able to meet the physical demands of this position?

22. Do you have a valid driver's license?

23. How do you balance your calendar to include daily field visits and lab work?

24. What experience do you have with lab equipment?

25. Are you willing to work weekends?