NADP News
SampleID field added to MDN Export
Starting in July 2025 the output of the MDN Weekly Sample Export is changing to include the SampleID field. This will facilitate communication regarding samples, as well as make the NTN and MDN reports more similar. The original report fields (in order) were: siteID | dateOn | dateOff | yrmonth | sampletype | qr | notes | rgPpt | sVol | subppt | HgConc | HgDep | datemod The updated report fields (in order) are: siteID | dateOn | dateOff | yrmonth | sampletype | qr | notes | rgPpt | sVol | subppt | HgConc | HgDep | datemod| sampleID If there are […] View
NTN Network NH4 Map and Grid Corrections (2016 – 2017)
The concentration and deposition maps and grids have been updated in the NTN gradient maps page. Starting in November 2024, the original maps, reflecting data generated from an incorrect NH4 mdl value, have been marked as with an “(ERR)” note. The normal links now reflect the updated 2016 and 2017 NH4 values which were corrected […] View
AMoN Data Processing Updates
On November 12, 2024, the NADP AMoN Data Export function changed from delivering dynamically coded data to statically coded data. This update also corrected some coding mistakes. If you downloaded AMoN data prior to November 7th 2024, please read the timeline and details below to see what was corrected in the data. The August 2024 […] View
New Data Request Form
NADP is launching a new Data Request Form for requesting custom reports from NADP. Custom reports may involve chemistry or precipitation data not currently provided by the web pages, or specific site or agency data as requested by specific agencies. Using this form fulfills a couple needs to help us improve our data sharing. It […] View
Updates to Precipitation and Sample Data
Precipitation Data Adjustments In the past year, NADP has been making updates to how the electronic precipitation gauges are configured. Previously, almost all gauges were set to report precipitation data using Greenwich Mean Time (GMT). NADP, via Environmental Engineering and Measurement Services, Inc. (EEMS), is resetting these electronic gauge clocks to report precipitation data using […] View
Change Log Published
NADP has released a change log which documents when published data has been updated. The change log can be found in either the NTN or MDN network page under the “Data Notices” section. Metadata for the change log can be found in either the NTN or MDN network page under the “Metadata” section. This is […] View
New NTN Sample ID# Format
In a continued effort to make more aspects of all NADP networks consistent, we updated the format of NTN sample ID numbers. Starting tomorrow, 3/1/2024, new NTN sample ID numbers will be used. The old format remains in place for the past samples, but anything received on 3/1 and beyond will have the new formatted […] View
NTN Aggregated Conductance Errors (2021 and 2022)
In November 2023, an error was discovered in the script used to calculate the monthly, seasonal, annual, and water year PWM values for conductance. The script was incorrectly multiplying the weekly value by 0.5, reducing the calculated conductance PWM values by half. This affected all aggregated monthly, seasonal, annual, and wateryear conductance values for 2021 […] View
MDN Bottle Contamination and Samples Affected
MDN Bottle Contamination Issue In mid-November 2022, a contamination issue was discovered with the MDN sample collection bottles that had been in circulation since the end of August 2022. Once identified, the lab immediately stopped sending out bottles from the contaminated bottle lot. It should be noted that this bottle lot was appropriately screened with […] View
NTN Network NH4 Method Detection Limit Corrections (2016-2017)
In late 2022 it was recognized that the NH4 values appeared to be too high for the 2016 NTN network data. Investigation determined that the data was calculated with an incorrect value of the Method Detection Limit (MDL) for NH4. The incorrect value was set at 0.19mg/L, while the correct value was actually 0.019 mg/L. […] View