What are the water sampling requirements for a CFO on a private, individual water supply (not connected to a public, treated water supply)?

Potable water from properly constructed on-site water well must be tested for the following constituents at the testing frequency listed: 

CONSTITUENT                      TESTING FREQUENCY                                         EXPECTED RESULT 

Total Coliform Bacteria     Quarterly (once every 3 months)*                           Absent 

Fecal Coliform                       Quarterly (once every 3 months)*                           Absent 

Nitrate (NO3)                          Annually (once every year)*                                     ≤ 10 mg/L 

Nitrite (as nitrogen)             Once every 3 years*                                                     ≤ 1.0 mg/L 

Secondary Standards         1 At least once*                                                                Variable 

Fluoride                                   At least once*                                                                  ≤ 2.0 mg/L 


¹Secondary MCL Standards (General mineral/physical): bicarbonate, carbonate, hydroxide alkalinity, calcium, iron, magnesium, manganese, pH, specific conductance, sodium, and total hardness. 

*Required testing frequency may vary depending on results.

There are no additional water sampling requirements for public, treated water supplies

Show All Answers

1. What is a Cottage Food Operation (CFO)?
2. What is meant by “private home"?
3. Can a CFO have employees?
4. Are there limitations on the size of CFO’s sales?
5. What types of cottage food can a CFO prepare?
6. What are the two categories of CFOs?
7. What is meant by “direct sale” of cottage food?
8. What is meant by “indirect sale” of cottage food?
9. Can I deliver my orders to customers using US Mail, UPS FedEx or other indirect delivery methods?
10. What are the CFO’s operational requirements?
11. What are the water sampling requirements for a CFO on a private, individual water supply (not connected to a public, treated water supply)?
12. Does a CFO need a permit to operate?
13. How much will the CFO registration or permit cost?
14. How often will a CFO be inspected?
15. What would be my food labeling requirements?
16. Can a CFO expand their home kitchen area square footage?
17. What is my legal responsibility as a cottage food operator in ensuring that my food product is safe?
18. What if I find out an ingredient I used has been recalled because it can make people sick or has been identified as the cause of food borne illness?
19. What is my liability as a cottage food business operating out of my home?
20. What other educational resources and guidelines are available to assist me in ensuring I am making a safe food product?
21. What can I do to ensure I am still meeting legal requirements if my cottage food operation grows to exceed the gross annual sales limit?
22. Where can I file a complaint about a cottage food operation or cottage food product?
23. I want to become a CFO - What should I do now?