iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
In the United States, the permits and monitoring for industrial wastewater depend first on where the water goes. A discharge directly to surface water may require an NPDES permit; a discharge to a municipal sewer is governed by pretreatment standards and local control-authority requirements; and industrial stormwater may require separate NPDES coverage. The applicable permit or control mechanism—not a universal checklist—sets the facility’s limits, sampling and reporting duties.
This is a federal Clean Water Act overview. State, tribal, territorial and local rules can add requirements or be more stringent.
Which permit pathway applies to the facility?
Map each wastewater stream and stormwater outfall to its destination. A facility may have more than one discharge route and therefore more than one set of obligations. Installing or operating treatment equipment does not, by itself, identify the applicable permit: the discharge route, process and governing authority matter.
| Discharge route | Likely regulatory pathway | Where to find monitoring requirements |
|---|---|---|
| Direct discharge from a point source to surface water | NPDES individual or general permit, if coverage is required | The applicable NPDES permit, including its limits, monitoring conditions and reporting requirements |
| Discharge to a publicly owned treatment works (POTW) sewer | Federal, state and local pretreatment requirements; an industrial-user permit or other control mechanism may also apply | Applicable categorical standards and the POTW or other control authority’s requirements |
| Runoff from industrial activity through an outfall | Industrial stormwater NPDES coverage may be required for certain facilities | The applicable stormwater permit and the facility’s Stormwater Pollution Prevention Plan (SWPPP) or equivalent plan |
EPA’s NPDES program establishes discharge limits and conditions for industrial and commercial sources based on the facility or activity, to protect receiving-water quality or prevent interference with POTW operations. The facility’s permitting authority and applicable permit determine the controlling conditions.
#1 Best Overall
- Clear Range: This house water testing kit offers clear, easy to read results and acceptable ranges for all substances. The water contaminant tester delivers clear results on any type of water
- Easy to Use: The water hardness test kit for water softener is as easy as adding the water, setting a timer, and reading the results. The pH strips for water testing come with an easy-to-read results guide
- Easy to Understand: The water tester for drinking water comes with a clear guide on the outside of the bottle that lines up with each strip, from alkaline level to soft characteristic readings
- Data Sheet Included: These water testing kits for drinking water include a data sheet to record readings for later analysis. The complete water tester for chemicals has it all
- Peace of Mind: This well water test kit comes with a 17-in-1 test strip and 2 separate bacteria tests to check for coliform and e coli. Knowing what’s in the water for peace of mind is easy
Does an industrial wastewater discharge to surface water need an NPDES permit?
A direct discharge to surface water through a regulated point source should be assessed for NPDES coverage. Depending on the facility and jurisdiction, coverage may be through an individual permit or a general permit. EPA or an authorized state, tribal or territorial authority may administer the program.
Use the applicable permit to identify the discharge limits and all operating and compliance conditions. In particular, check its requirements for:
- regulated pollutants and numeric limits;
- authorized discharge points and sampling locations;
- sample type, collection and analytical methods;
- monitoring frequency and reporting deadlines; and
- any additional operating, notification or recordkeeping conditions.
Do not assume that another facility’s permit, or a generic description of a treatment system, establishes the limits or sampling plan for this site.
Rank #2
- Professional Quality Testing Kit: The AAwipes Aquarium test kit (50 strips) is developed by experts for fish enthusiasts. It offers 8-in-1 testing capabilities, made with high-quality fiber paper and non-bleeding colors. The kit measures key parameters like Free Chlorine, Nitrate, Nitrite, Hardness, Sodium Chloride, Total Alkalinity, pH and Ammonia nitrogen. By identifying potential issues, our fish tank testing kit helps prevent hidden water problems and ensures the safety and well-being of your fish.
- Versatile Use for Freshwater and Ponds: This aquarium water test kit is versatile and suitable for both freshwater and saltwater environments. It can be used in various aquariums, fish tanks, ponds, pools, and shrimp tanks, making it easy to monitor water quality and ensure your filter functions properly. Experts recommend testing your aquarium water at least twice a week to maintain optimal water quality.
- Fast and Accurate Results: Get accurate results in minutes with just 3 steps: 1) Dip the test strip into water for 2 seconds for pads 1-7; dip pad 8 (Ammonia nitrogen) separately for 5 seconds. 2) Remove the strip without shaking off excess water. Hold horizontally for 30 seconds for pads 1-7, wait 180 seconds to read Pad 8 (Ammonia nitrogen). 3) Compare the colors to the chart for up to 99% accuracy and take necessary action.
- Extended Shelf Life: The test strips are packaged in a well-sealed bottle to ensure they remain effective over time. This protects the strips from moisture and other environmental factors, ensuring you have reliable testing materials on hand when needed.
- Convenient Use: With this kit, you can test your aquarium water at home without the need to send samples to a lab, saving you both time and money. Enjoy peace of mind knowing your aquarium water is balanced and safe without the stress or extra expense.
What permit is needed to discharge industrial wastewater to a municipal sewer?
A sewer discharge follows the pretreatment pathway, not the direct-discharge NPDES pathway. Industrial users must meet applicable federal, state and local pretreatment requirements intended to protect the POTW and its treatment process. The control authority is often the POTW, but another designated authority may administer the requirements. An industrial-user permit or another control mechanism may be required; core pretreatment duties can apply even if the facility has not received an individual permit or control mechanism.
Check whether categorical standards apply
Federal categorical pretreatment standards apply to specified industrial processes. EPA lists these process-specific standards in 40 CFR Parts 405–471. Identify the facility’s industrial category and applicable standards before deciding which pollutants to monitor or how to demonstrate compliance.
Check whether the facility is a significant industrial user
EPA describes significant industrial users (SIUs) as including categorical industrial users, subject to a regulatory exception, and certain other users. The federal criteria include a user that discharges an average of 25,000 gallons per day or more of process wastewater, a process wastestream that makes up at least five percent of the POTW’s average dry-weather hydraulic or organic capacity, or a user designated by the control authority because of a reasonable potential to affect POTW operations or violate a requirement. These are regulatory classification criteria, not general estimates of facility impact; confirm how the applicable rules treat the facility.
Rank #3
- 17 IMPORTANT PARAMETERS: The Varify Premium Drinking Water Test Kit offers an unrivaled, complete analysis of your drinking water by testing for 17 essential parameters. This includes crucial tests for chlorine, fluoride, lead, iron, bacteria, and more, ensuring that you're fully informed about the quality of your water. With this extensive range of testing capabilities, you can detect contaminants and imbalances that could affect your health, providing a holistic view of your water's safety.
- PREMIUM QUALITY: Varify stands out with its professional-grade quality, ensuring that every test strip in the kit meets the standards of precision and reliability. Crafted with meticulous attention to detail, this kit is designed to provide you with a dependable and thorough analysis of your water's composition.
- EASY TO USE: Varify's water test strips and Bacteria Test kits feature a user-friendly, color-coded system for quick and precise water quality assessments. With clear color changes indicating various parameters, these strips make complex data easily understandable, ensuring you can evaluate your water's safety effortlessly in just minutes.
- ACCURATE AND RELIABLE: Varify's water test kit comes with 100 strips in 5 separately sealed pouches (20 strips each), preserving freshness and extending shelf life for dependable testing. It also includes 2 easy-to-use bacteria tests that deliver results in 48 hours, ensuring thorough and accurate assessment of your water's safety and cleanliness. This design ensures precision and convenience in monitoring your water quality.
- WATER TESTING KITS THAT GIVE BACK: With every Varify test kit, not only do you secure the safety of your drinking water with our precise and easy-to-use testing solutions, but you also contribute to a global cause. A portion of proceeds goes to Water For Good, fighting water poverty in Central Africa. This means each test not only brings peace of mind to you but also supports #CleanWaterWorldwide, making a real difference in communities in need.
Categorical industrial users may have to submit baseline monitoring reports, compliance-schedule progress reports, 90-day compliance reports and periodic compliance reports. SIUs generally submit periodic reports at least once every six months under applicable requirements. The governing regulation and control mechanism determine exact deadlines, forms, signatory requirements, sampling and analysis procedures.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsDoes industrial stormwater need a separate permit?
Potentially. Stormwater runoff from industrial activity is a separate discharge to assess, even when process wastewater is sent to a sewer or treated onsite. Certain industrial facilities must obtain industrial stormwater NPDES coverage, prepare a SWPPP or equivalent plan, and implement measures to prevent pollutants from being discharged in runoff.
Confirm the facility’s industrial classification and the applicable EPA or state stormwater permit. Those provisions determine whether coverage is required and specify any inspections, monitoring, reporting and plan requirements. Do not assume that a process-wastewater permit also covers stormwater.
Rank #4
- THE ORGINAL DIY BACTERIA TEST KIT that is certified accurate by Good Housekeeping Labs, American Red Cross, Underwriter Labs, and Merck Labs. Designed and developed by our EPA certified scientists. Made in the USA.
- PATENTED TECHNOLOGY: Detects 50 different species of coliform bacteria (including E. coli), as low as 1-organism. Test any freshwater supply.
- 3RD PARTY STERILIZATION: Every Safe Home kit is sterilized by a certified facility (see attached certificate) and guaranteed to be “free from bacteria” before you test. This process assures zero “false positive results” from product contamination, as may be experienced with other kits who skip this sterilization process.
- FAST RESULTS- Get results as quickly as 6 hours. May take up to 72 hours based on incubation conditions, and concentrations of bacteria in the water being tested.
- YOUR PURCHASE MAKES A DIFFERENCE in people’s lives. Safe Home donates a portion of every test kit sale to clean water initiatives around the globe. See attached images with this listing, to learn more.
What monitoring, reporting and records are required?
There is no single sampling schedule for every industrial facility. The permit or control mechanism and applicable standards determine the pollutants, limits, sampling point, sample type, approved methods, frequency, reporting dates and records to retain.
For POTW discharges
Industrial users must perform required self-monitoring, submit required reports and notifications to the control authority, and keep required records. Depending on the applicable requirements, notifications can concern changed discharge practices, potential slug discharges, noncompliance, hazardous-waste discharges or bypasses. EPA guidance recommends setting monitoring frequency to produce representative compliance data, considering the nature and volume of the wastewater, historical information available to characterize it, and actual or potential effects on the POTW. Less characterization data may support more frequent sampling; the control authority’s requirements govern.
Free tools Windows power users keep installed
One-click scans. No signup required.
For direct and stormwater NPDES discharges
Use the applicable NPDES permit’s monitoring tables and conditions. They establish the regulated pollutants, sampling locations and methods, monitoring frequency, reporting requirements and any special conditions. A general permit’s requirements can differ from an individual permit’s, and state permit provisions may differ from federal examples.
Quick Recap
How to determine the facility’s actual obligations
- List the discharge routes. Identify every process-wastewater stream, sewer connection, surface-water outfall and relevant stormwater outfall.
- Describe the facility and wastewater. Record the location, industrial process or sector, wastewater sources, average and peak flows, treatment chemicals, likely pollutants and available historical sampling results.
- Identify the authorities and existing instruments. Check for existing NPDES permits, stormwater coverage, industrial-user permits or other control mechanisms, and determine whether EPA, an authorized permitting authority, a POTW or another local control authority administers each requirement.
- Confirm applicable standards and classifications. Determine whether categorical pretreatment standards apply and whether the facility meets SIU criteria or another local designation.
- Build the monitoring calendar from controlling documents. Extract each pollutant, limit, sample point, method, frequency, reporting deadline, notification trigger and recordkeeping duty from the current permit, standards and local requirements.
- Resolve gaps with the authority. If the destination, coverage, classification, sampling plan or reporting duty is uncertain, confirm it with the issuing authority or control authority before relying on an assumed requirement.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
