Data screening indicates a possible concern for nutrients, possibly from domestic wastewater effluent or from natural sources, but probably not due to stormwater runoff. Ten water permits are in this segment. Data screening indicates a concern for nutrients, perhaps because the samples are from directly below the city of Dalhart effluent discharge. A concern for dissolved solids may be due to samples collected during low flow conditions. A concern for pH may be due to natural conditions.
More investigation is warranted.
Screening indicates a possible concern for dissolved oxygen, but all the samples were taken during summer months, when dissolved oxygen would be low due to natural processes triggered by nutrients. A possible concern is for dissolved metals. Only one sample had been taken for each metal. Additional sampling and analyses are recommended.