Subsurface Wastewater Disposal Systems
�China Lake Septic Project produced by the Town of China and KWD (2005)
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�Pre- 1974 septic systems without permits are potentially contributing to nutrient loading
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To estimate the impact of septic systems, we used data from the China Lake Septic Project produced by China and the KWD.

The project found the majority of shoreline houses use septic systems but some houses have holding tanks.

This graph compares the town records of septic systems permits and the date of house construction.  What is most important is the houses without permits on record. For the 94 houses built after 1974, the lack of permits is probably more of a paper work issue than non-compliance issue.

However, The 332 houses built before 1974 or have no construction date available could have been installed improperly or be malfunctioning.  Therefore these systems may be contributing to phosphorus and nitrogen loading in China Lake.  Updated records or inspections are needed for these properties.