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Environmental Monitoring Database (EMD)

Storing a wide variety of data collected from state agencies, federal agencies, municipalities and volunteer groups.

The Environmental Monitoring Database (EMD) stores a wide variety of data collected from state agencies, federal agencies, municipalities and volunteer groups. The EMD contains data for surface water, groundwater, drinking water, air, waste, soils, sediments, habitats, toxicity and for biological sampling. Programs within NHDES and outside sampling groups submit data to this database. There are both grab samples and time-series data. Data is then used by internal and external users for a wide variety of reasons, including assessments, research projects, statistical reports and history.

For example, NHDES requests that waste sites upload PFAS sampling analytical data to the EMD; the data are then posted to the NHDES PFAS Investigation Sampling Map.

To get an Excel spreadsheet of data in the EMD, please email Data can be queried by any field in the database such as town, parameter, lake name and sampling station ID.

The data in the EMD is displayed on the OneStop Data Mapper. This mapper allows you to click on sampling stations to see the data associated with that location. It is meant to be a quick look at the sampling information available and does not contain all the metadata associated with that sampling event. You must have special credentials to see well sampling data, but all other data is available to view using the guest option.

Frequently Asked Questions

How do I submit data?  

There are different requirements for different programs so be sure to check with your program manager for those specifications. In general data is submitted to the EMD in Excel and must be entered into special Excel templates. Many labs will start the formatting for you – ask if they can provide data in “EMD Format”. If they don’t format data for EMD upload, at a minimum ask that they provide the data to you in Excel. There may even be some labs that will submit the data for you. If your lab does not, you will need to apply for a login and submit the file through the OneStop Data Provider EMD page. If it’s your first time submitting data or you need assistance, email for more information on this process.   

Do I have to upload sampling locations/stations?

The sampling locations must be uploaded first using the Station templates. This only needs to be done once so if you’ve done it in the past or someone else has done it, move on to the Activity templates. There is a full station template and a “lite” station template. If you’re not sure which to use, use the full version. You can also use the NH Online Form, which will walk you through this process.

How do I upload grab sample data?

Activity templates are where the sampling data and results are entered. If your lab formatted the data for you, copy that data directly into the full template and the columns should align. Now you just need to make any final edits – use the validation tool on the OneStop Data Provider EMD page to find out what edits are needed. If your lab has not formatted the data for you, then you should format the data to match the columns in the template and then copy that data into the template. The templates each contain tabs that describe each column and whether or not it’s required. Similar to the station templates there is a full activity template and a “lite” activity template. If you’re not sure which to use, use the full version. Feel free to hide any columns that you aren’t using.  

How do I upload time-series or datalogger data?  

Time-series data or datalogger data is submitted through NH Online Forms. The form asks for information about the installation such as where it was installed and how long it was installed. The datalogger file is then attached in Excel. This Excel document must be formatted in a specific way in order to be uploaded, so make sure to read the instructions for formatting.  

Datalogger Upload Form